CHINGA BOYS HIGH SCHOOL

APRIL HOLIDAY ASSIGNMENT 2020

ENGLISH FORM THREE

Read and make notes on:

1. Write a two page summary of the text.2. Highlight and adequately illustrate ten. Themes depicted in the test.3. Identify and illustrate the character traits of (i) Ole Kaelo(ii) Mama Milanoi(iii) Resian(iv) Taiyo(v) Oluisudori(vi) Ole Supeyo(vii) Minik Ene Nkoitoi(viii) Olarinkoi

4. Give and adequately illustrate at least six styles highlighted in the text.

SHULE YA UPILI YA WAVULANA CHINGAKAZI YA LIKIZO KISWAHILI KIDATO CHA TATU 2020

Soma nakala ya Chozi la Heri na uchambue kwa kina (ploti, maudhui, lugha na wahusika). Soma nakala hii aghalau mara mbili.)

CHINGA BOYS HIGH SCHOOLAPRIL HOLIDAY ASSIGNMENT 2020CRE FORM THREE

AMOS1. State the sins that were condemned by prophet Amos2. List five visions that Amos saw concerning the coming judgment on the

People of Israel.

3. Give reasons why prophet Amos was against the way the Israelites Worshipped God.4. (a) State the teachings of prophet Amos about the day of the lord (8 mks)

(b) How can Christians assist the church leaders to perform their duties effectively?

(5 mks)

5. How is the church promoting social justice in Kenya today? ( 6 mks)6. (a) In what ways did the Israelites break their relationship with God during the time

of Amos.

(b) State the relevance of Amos message on judgment for Christians today.

7. Describe how Amos background was relevant to his future career.8. Show how the poor were oppressed during the time of prophet Amos9. Explain Amos teachings on social justice and responsibility in Israel.

UNITY OF BELIEVERS

1. Identify five causes of disunity in the early church.

2. Explain the factors that prevent effective church co-operation in Kenya.

3. Explain the factors that prevent effective church co-operation in Kenya.

4. Give reasons why Christians in Kenya should work in unity

5. a) In what ways was the celebration of the Lord’s supper misused in the

Church at Corinth.

b) Give reasons why Christians take part the Holy Communion

6. a) Explain what the teaching of Jesus about the vine and the branches in John

15:1-10 reveal about the unit church in Kenya today. (7mks)

7. What symbolic titles do Christians use to describe their unity?

8. In what ways are the people of God described (1 peter 2:9-10)

9. Outline the New Testament teaching on unity of believers as the bride

10. Explain the vine and the branches as a symbol of unity of believers.

11. Identify ways in which the unity of believers is expressed in the concept of the body of Christ.

THE GIFTS OF THE HOLY SPIRIT

1. Write down five activities of the church in Kenya, which show that the Holy

Spirit is working among Christians

2. Write down five teachings about Jesus from Peter’s speech on the day of

Pentecost

3. State the teachings of Saint Paul in (1 corn 13) about love

4. State five ways in which the gifts of the Holy Spirit have been abused in

the church .today

5. List five spiritual gifts given to the church according to Saint Paul

6. Ways in which Peter’s life was transformed on the day of Pentecost-Acts

7. Outline the teaching of Jesus on the role of the Holy Spirit

8. With reference to the day of Pentecost, outline Peter’s message to the People

9. Explain how the use of the Holy Spirit brought disunity in the Church at Corinth(6 mks)

10. a) State ways in which the Holy Spirit brought disunity in the church today?

(6 mks)

b) How are the gifts of the Holy Spirit misused in the church today? (6 mks)

11. Identify the fruit of the Holy spirit taught by Saint Paul in Galatians 5: 22-23 (5mks)

12. State the fruits of the Holy Spirit

13. In what ways do Christians today use the fruits of the Holy spirit to spread the Gospel

14. In what ways did the Holy Spirit manifest himself on the day of Pentecost?

15. Explain how the use of the Holy Spirit brought disunity in the church at Corinth.

CHINGA BOYS HIGH SCHOOLAPRIL HOLIDAY ASSIGNMENT 2020HISTORY AND GOVERNMENT FORM THREE

COLONIAL ADMINISTRATION SYSTEMS

1. Name 2 systems of colonial administration which were used by the Britsh to administer

their colonies in Afrca.

2. Descrbe the factors which facilitated the application of the French policy of assimilation

in the 4 countries in Senegal.

3. Discuss the effects of the French policy of assimilation in Senegal.12 marks

4. What were the difference between the French policy of indirect rule and the French

policy of assimlaton.

5. Explain why Fredrck Lugard used the polcy of indirect rule to administer Northern

Nigera.

6. Defne indirect rule as a policy that was used by the British to administer their colonies in

Africa.

7. Explain reasons why indirect rule was unsuccessful in Southern Nigeria.

8. Why did the British use direct rule in Zibambwe.

9. Explain the effects of British rule in Zibambwe.

10. State 2 conditions that one lead to fulfill in order to become fully assimilated in French

West A frica.

11. Why did the British use indirect rule to administer Northern Nigeria.

12. Give 2 functions of the chiefs in Zibambwe during colonial period.

13. State 3 privileges which were enjoyed by assimilated Africans in the 4 communes of

Senegal.

14. Why did French system of assimilation fail in areas outside the communes?

15. Give 2 results of French assimilation policy in Senegal.

16. Give 5 reasons why the British used indirect rule to administer Northern Nigeria.

17. Give one method used by the French to administer their colonies in Africa.

18. Explain the effects of the use of indirect rule by the British in Northern Nigeria.

19. Give 3 conditions which one had to fulfil in order to become a French Citizen in Senegal

20. Explain 6 differences between the use of British indirect rule and the French assimilation

policy.

21. Explain 2 roles played by African chiefs in the British colonial administration in Nigeria.

22. Name 3 communes that were established by the French in Senegal during colonial period.

23. Describe the structure of the British colonial administration in Northern Africa.

24. State 3 simillarities between the French and British structure of administration in Africa.

25. Explain 6 problems experienced by the French administration in Senegal.

26. OutlineState 3 simillarities between the French and British structure of administration in

Africa.

27. Explain 6 problems experienced by the French administration in Senegal.

28. Outline 2 similar methods used to recruit African labour in the British and French

colonies.

29. State one economic problem that was experienced by british colonialists in Nigeria.

30. Outline 3 reasons why the policy of assimilation was easily applied in 4 communities of

Senegal.

31. Explain 6 effects of the British rule in Zibambwe.

32. Menton 1 consequence of the French assimalition policy in Senegal.

33. Give one economic problem experienced by the British colonialists in Nigeria.

INTRODUCTION TO HISTORY AND GOVERNMENT

1. Identify two sources of information whch historians use to write the history of Africa.

2. Give two limitations of usng written records as a source of Afrcan hstory.(2mks)

3. State two lmtations of oral tradition as source of hstory.(2mks)

4. What is oral tradition as a source of history?(1mk)

5. SState one advantage of written materials as a source of history.(1 mark)

6. Give one contributon of archeology to the study of history.(1mark)

7. Give two sources of information in history and government. (2marks)

8. Name two types of written materials used by historians as a source of history and

government.(2marks)

9. Give two archeological sources of information on history and goveeernment.(2marks)

10. Give the relationship between history and government.(1mark)

11. Give two methods used by elders to pass information to the young generation on history

and government in the traditional African communities.(2marks)

12. Identify two branches of history.(2marks)

EARLY MAN

1. List 2 economic activities of early man during the stoneage period(2marks)

2. Identify two aspects of the culture of the early man that had the origin in the late stone

age period(2marks)

3. Descrbe two origins about the orgin of human beings.(4marks)

4. State two distinct characteristics of Homo Erectus(2marks)

5. Discuss the benefits of the discovery of fire to early man.(11marks)

6. What things do archeologists use to reconstruct the activities of people who lived in pre-

historic tmes?(5 marks)

7. Explain five ways in which Homo erectus attempted to improve his way of life.(10marks)

8. State two features of Homo sapiens.(2 marks)

9. Identify two ways in which early man used stone tools.(2marks)

10. What were the advantages of the discovery of fire by the early man?(3marks)

11. What were the benefits of the discovery of fire by the early man(12marks)

12. State one theory that explains the origin of people(1mark)

13. What were the stages in the development of tools by early people?

14. Give one reason why Homo habilis was referred to as “able” man(1mark)

15. What were the physical changes which occurred in early human beings as they evolved

from ape-like creature to modern people?

16. Describe the way of life of early human beings durng the Old stone age period(10 marks)

17. State two methods used by Early man to find food during the stone age period(2marks)

18. Give one reason why early people moved from the forest s to settle n the grasslands.

(1mark)

19. State Charles Darwin’s theory of evolution.(1mark)

20. Give three stages n the evolution of man before Homo Erectus.(3marks)

21. State the scientific theory that explains the origin of human beings(1mark)

22. State two uses of stone tools by early people during the Stone Age period(2

marks)

23. Give two reasons that made early human beings to live in groups during the

stone age period(2marks)

24. Give 3 physical characteristics of the Homo erectus.(3marks)

25. Explain 6 cultural practices of Homo sapiens during the new stone age.(12marks)

26. Identify one type of artifact that is likely to be found in an archeological site(1mark)

27. Name one source of information on creation theory of man.(1Mark)State 3 disadvantages

of hunting as an economc activity of the early man.(3marks)

28. Explan six benefits of settling in villages during the late stone age period.(12marks)

29. Name two types of dweelings used by early man during the early stone age.

30. Give 5 reasons why hunting of wild animals was mainly a group activity during the stone

age period.(5marks)

31. Describe five ways in which the development of the upright posture improved the early

mans way of life.(10marks)

32. State 2 disadvantages of using caves as shelters by the early human beings activity

during the stone age period.

33. State 3 characterstics of microlithc tools used during the late stone age period.

34. Explain 6 challenges faced by early human beings n hunting and gathering activities.

35. State 5 stages of evolution of man.

36. Describe the way of life of human beings during the late stone age period.

37. Give 3 disadvantages of hunting as an economc activity by early human beings.

CHINGA BOYS HIGH SCHOOL

FORM 3 ASSIGNMENT TERM 1 2020 BUSINESS STUDIES

Instructions: IN ADDITION TO THE ASSIGNMENT GIVEN; READ AND WRITE NOTES ON:

1. The remaining part of SIZE AND LOCATION OF A FIRM ;a) Advantages and disadvantages of Localization and delocalizationb) Economies of scale; Internal and external economies of scalec) Diseconomies of scale; internal and external diseconomies of scaled) Implication of production activities on the environment e) Maintaining a healthy environment

2. CHAINS OF DISTRIBUTION a) Definition of distribution channel b) Function of channel of distribution c) Roles played by intermediaries in the chain of distribution d) Distribution channel of various products- local agricultural products, Imported

agricultural products, Locally manufactured goods and imported manufactured goods

CHINGA BOYS HIGH SCHOOL

BIOLOGY FORM THREE HOLIDAY ASSIGNMENT- MARCH 2020.

ECOLOGY

1. State how excessive use of pesticides may affect soil fertility2. The graph below represents a population growth of a certain herbivore in a grassland

ecosystem over a period of time.

Suggest three factors that could have caused the population change between C and D

3. A biologist carried out a study to investigate the growth of a certain species of herbivorous bony fish and the factors influencing plant and animal life in four lakes A, B, C and D. The lakes were located in the same geographical area.Two of the lakes A and B were found to contain hard water due to presence of high content of calcium slats. The mean body length of 2 year old fish, amount of plant life and invertebrates biomass in each lake were determines. The data was as shown in

Lakes Mean body length (cm)

Type of water

Amount of plant life

Invertebrate biomass (g/cm3)

Insects Snails Crabs Worms

A

B

C

D

31.2

28.6

18.4

16.3

Hard

Hard

Soft

Soft

1050

950

1.2

0.5

11

72

97

99

300

100

0

0

10

9

2

1

180

90

20

10

(a)Describe the procedure that may have been used to determine the mean body length of the fish

(b) What are the likely reasons for the difference in the mean body length of the fish living in lakes A and D?(c)Suggest one reason for the absence of snails in lakes C and D?

(d) (i) Name any six abiotic (physical) factors that are likely to influence the plant and animal life in lake A.

(ii) Explain how each of the factors named in (i) may influence the plant and animals life in Lake A.

4. During an ecological study of a lake a group of students recorded the following observations.

(i) Planktonic crustaceans feed on planktonic algae(ii) Small fish feed on planktonic algae planktonic crustaceans worms and insect

larvae(iii) Worms feed on insect larvae(iv) Bird species feeds on small fish planktonic crustaceans and worms(v) Insect larvae feed on small fish

(a) From this record of observations construct a feed web (5 marks)

(b) From the food web you have constructed in (a) above isolate and write down a food chain that ends with:(i) Bird species as a secondary consumer

(ii) Large fish as tertiary consumer

(c) The biomass of the producers in the lake was found to be greater than that of primary consumers. Give an explanation for this observation?

(d) Using either the observations recorded by the students or the food web you have constructed name

(i) Two organisms that compete for food in the lake.

(ii) The source of food the organisms in d (i) above compete for

(e) (i) State three ways by which many may interfere with this lake ecosystem

(ii) Explain how each of the ways you have states may affect life in the lake?

5. An investigation was carried out between 1964 and 1973 to study the changes of fish population in a certain small lake. Four species of fish A, B, C and D were found to live in this lake. In 1965 a factory was built near the lake and was found to discharge hot water into the lake raising the average temperature from 250C to 300C. In 1967 sewage and industrial waste from a nearby town was diverted into the lake was stopped. The fish population during the period of investigation is shown in the table below.

Fish species

Fish populations during the period

1964 1966 1969 1970 1971 1972 1973

A

B

6102

208

223

30

26

11

106

22

660

63

4071

311

7512

405

MiceDomestic cats

Grasshopper → Lizards → Snakes

C

D

36

4521

100

272

0

23

0

27

0

79

0

400

0

617

(a) (i) In which year were the fish populations lowest?(ii) State the factors that might have caused the lowest fish populations during the

year you have stated in (a) (i) above ( 3 marks)

(iii) Explain how each factor you have stated in (a) (ii) above could have brought about the changes in fish populations (11 marks)

(b) (i) What is the difference in the rate of population recovery of species A and D?

(ii) Suggest two biological factors that could have led to this difference

(c) (i) State a method that might have been used to estimate the fish population in the lake(ii) State one disadvantage of the method you have stated in (c) (i) above

6. Industrial wastes may contain metallic pollutants. State how such pollutants may indirectly reach and accumulate in the human body if the wastes were dumped into rivers.

7. State three measures that can be taken to control infection of man by protozoan parasites

8. The chart below shows a feeding relationship in a certain ecosystem

Green plants Hawks

(a) Construct two food chains ending with a tertiary consumer in each case (2 marks)(b) Which organisms has the largest variety of predators in the food web? (1 mark)(c) Name secondary consumers in the food web ( 2 marks)(d) Suggest three ways in which the ecosystem would be affected if there was prolonged

drought.9. To estimate the population size of crabs in a certain lagoon, traps were laid at random. 400

crabs were caught, marked and released back into the lagoon. Four days later, traps were

laid again and 374 crabs were caught. Out of the 374 crabs, 80 were found to have been marked.

(a) Calculate the population size of the crabs in the lagoon using the formula below (b) State the assumptions that were made during the investigation.

(b) What is the name given to this method of estimating the population size?(a) Distinguish between a community and a population

(b) Describe how a population of grasshopper in a given area can be estimated

10. Explain how the various activities of man have caused pollution of air 11. Explain why the carrying capacity for wild animals is higher than for cattle in a given piece

of land12. (a) What is meant by

(i) Autecology (ii) Synecology

(b) The number and distribution of stomata on three different leaves are shown in

the table below

Leaf Number of stomata

Upper epidermis Lower Epidermis

A

B

C

300

150

02

0

200

13

Suggest the possible habitat of the plants from which the leaves were obtained

Leaf Habitat Leaf Habitat Leaf Habitat

A ____________________ B ____________________ C ____________________

(c) State the modification found in the stomata of leaf C

13. After an ecological study of feeding relationships students constructed the food web belowLarge birds

Bird J Bird K Bird L Bird M Bird N

Small fish

Mussels Snails

Zooplankton

Algae Green plants

(a) Name the process through which energy from the sun is incorporated into the food web

(b) State the mode of feeding of the birds in the food web(c) Name two ecosystem in which the organisms in the food web live.(d) From the information in the food web construct a food chain with the large bird as a

quarternary consumer(e) What would happen to the organisms in the food web if bird N migrated?(f) Not all energy from one trophic level is available to the next level. Explain

(i) Two organisms, which display a role in the ecosystems, are not included in the food web. Name them.

(ii) State the role played by the organisms named g (i) above.

(g) (i) State three human activities that would affect the ecosystems .(ii) How would the activities stated in h (i) above affect the ecosystems?

14. How is aerenchyma tissue adapted to its functions?15. Explain how abiotic factors affect plants.16. What is the importance of the following in an ecosystem?

I) Decomposers (ii) Predation17. Chart below represents a simplified nitrogen cycle

What is represented by X, Y and Z?

18. (a) Distinguish between pyramid of numbers and pyramid of Biomass (b) Give three reasons for loss of energy from one trophic level to another in a food

chain.

(c) Describe how the belt transect can be used in estimating the population of a shrub in a grassland

19. Name a method that could be used to estimate the population size of the following organisms

(i) Fish in a pond (ii) Black jack in a garden

20. State two ways in which schistosoma species is adapted to parasitic mode of life21. Describe causes and methods of controlling water pollution ( 20 marks)22. (a) What is biological control of population growth? ( 2 marks)

(b) Describe one example where biological control has been used successfully

(c) Explain why the number of predators in any ecosystem is less than the number of their prey

23. Suggest reasons to account for the following observations.(b) Antelopes are more commonly found in open grassland while giraffe while

giraffes are commonly found in wooded areas.

(b) In the savannah there is a wider variety of herbivores in wooded areas than in open grassland

(c) Removal of predators for an herbivore may in the long run lead to a decrease in its population

Explain why primary productivity decreases with depth in aquatic environments.

24. The following is a simplified drawing of nitrogen cycle.

(a) Identify the compound named A ( 1 mark)

(b) Name the processes

X _________________ Y _________________ Z _________________

(c) In what form is nitrogen found in plants and animals?

NB: READ AND MAKE SHORT NOTES ON :AIR, LAND AND WATER POLLUTION (CAUSES EFFECTS AND CONTROL MEASURES)

CHINGA BOYS HIGH SCHOOLAPRIL HOLIDAY ASSIGNMENT 2020

CHEMISTRY FORM THREE1. (a) Aluminium is used in making cooking vessels and overhead cables. State the property of

aluminium that makes it suitable for the two uses separately.Cooking vessels………………………………………………… ( ½ mk)

Overhead cables ………………………………………………. ( ½ mk)

(b) Explain why it is not advisable to clean surfaces of cooking vessels made of aluminium using wood –ash solution

(2mks)

Gas K

Water

Piece of calcium

Substance KGlass funnel

Heat

Solid mixture of sodium chloride and ammonium chloride

2. The set-up below was used to prepare and collect gas L, produced by the reaction between water and calcium metal

(a) Name gas K (1mk)

(b) At the end of the experiments, the solution in the beaker was found to have a PH of about 11, explain

(2mks)

(c) Write a balanced chemical equation for the reaction that occurs(1mk)

3. The following set-up shows the heating of a mixture of equal amounts of sodium chloride and ammonium chloride

(a) What is substance K?(1mk)

(b) What is the process by which substance K is formed? (1mk)

4. Differentiate between the terms atomic number and mass number(2mks)

5. Explain why very little carbon (IV) Oxide gas is evolved when dilute Sulphuric (VI) acid is added to Lead (II) carbonate

(2mks)

6. A crystal of Copper (II) Sulphate was placed in a beaker of water. The beaker was left standing for two days without shaking. State and explain the observations that were made

(2mks)

7. Study the information in the table below and answer the questions that follows

Ions Electron arrangement Ionic radius A+B+C2+

2.82.8.82.8

0.950.13330.065

Explain why the ionic radius of

(a) B+ is greater than A+ (1mk)

(b) C2+ is smaller than of A+(2mks)

8. (a) State Graham’s law of diffusion(1mk)

(b) Gas D takes 110 seconds to diffuse through a porous partition. Gas D has a relative molecular mass of 34. How long will it take for the same amount of ammonia gas to diffuse under identical conditions? (H=1, N=14)

(2mks)

9. When reacting sulphur (VI) Oxide and Hydrogen Sulphides some traces of water vapour is required for the reaction to occur.

(a) State the role of water vapour(1mk)

(b) Write an equation for the reaction that occurs(1mk)

(c) Identify the reducing agent in the reaction in (b) above(1mk)

10. State and explain observation made when Conc. Sulphuric (VI) acid was added to sugar

crystals (2mks)

11. (i) Nitrogen (I) Oxide supports combustion of burning charcoal. Write an equation to show

this reaction(1mk)

Solid JSolid H

Dil. Hydrochloric acid

(ii) Ammonium nitrate can be heated to give off Nitrogen (I) oxide. However a mixture of

NH4Cl and NaNO3 is preferred. Explain (1mk)

(iii) State the physical test of Nitrogen (I) Oxide (1mk)

12. The set-up below was used to prepare dry sample of hydrogen Sulphide gas

(a)(i) Complete the diagram to show how the gas was collected (2mks)

(ii) Identify the following

II.Solid J(1mk)

(b) Write an equation for the reaction that occurred in the flask between solid H and dilute hydrochloric acid

(1mk)

13. Hydrogen chloride gas can be used to carry out fountain experiment. State the property of hydrogen chloride that make it suitable for this experiment

(1mk)

14. 0.92g of ethanol were found to burn in excess air producing a temperature rise of 32.5oC in 200cm3 of water(C=12.0,H=1.0, O=16.0) Density of water is 1g/cm3, specific heat capacity of water is 42KjKg-1K-1

(a) Write the equation for the combustion of ethanol(1mk)

(b) Determine the molar heat of combustion of ethanol (2mks)

15. Iron is extracted from its ore by blast furnace form its ore by blast furnace process.

(a) Name one ore from which iron is extracted (1mk)

Super heated hot water

N

M

(b) One of the impurities in iron is removed in the form of Calcium silicate. Write equations for the reaction in which calcium silicate is produced

(2mks)

16. Calculate the amount of Zinc in grams that would remain if 1.96g of the metal were reacted with 100cm3 of 0.2M hydrochloric acid. (Zn=65.0, H=1.0, Cl=35.5) (3mks)

17. (a) Starting with solid Magnesium Oxide, describe how a solid sample of Magnesium hydroxide an be prepared (2mks)

(b) Give one use of Magnesium hydroxide (1mk)

18. An oxide of element F has the following F2O5. Determine the oxidation state of F in the compound

(1mk)

19. An element X has a relative atomic mass of 44. When a current of 0.5 A was passed through the molten chloride of X for 32 minutes and 10 seconds, 0.22g of X were deposited at the cathode

Determine the charge on an ion of X (1F=96,500c)(3mks

20. (a) Differentiate between catalytic and thermal cracking of long chain organic compounds(2mks)

(b) State the disadvantage of C.F.C based compounds (1mk)

21. The figure below shows a simple extraction process of Sulphur

(a) Give the name of the process shown in the diagram above (1mk)

(b) What is the use of the superheated hot water?(1mk)

(c) State two physical properties of Sulphur that make it possible to be extracted using water(2mks)

22. (a) Define molar latent heat of vaporization of a substance(1mk)

(b) The Molar latent heat of vaporization of water at 100oC is 41.1kJ/mol. Calculate the heat

change when 1.0g of water at 100oC is converted into vapour at 100oC (H=1, O=16) (2mks)

23. Metals Q and T had their half-cells connected to a Zinc half-cell and the following reduction potentials were obtained fro each metal

Metal half-cell Reduction potential (volts)Q2+

(aq) Q (s)T+(aq)/T(s)

-1.37v-0.83v

(a) What name is given to the Zinc half-cell in this circumstances, and state its reduction

Potential (1mk)

(b) Metals Q and T were connected to form an electrochemical full cell

(i) Write the equations for the half-cell reactions that occur at the Q and T electrodes (1mk)

I. At electrode Q:

II. At electrode T:

(ii) Calculate the e.m.f of the electrochemical full cell in b(i) above(1mk)

24. Define the following terms:(2mks)

(i) Isotope

(ii) Isobars

Gas X

Burette

Chlorine water

Sunlight

25. A chromatogram of three dyes and three inks is shown below. Study it and answer questions that follows

(i) Identify dyes present in ink 3 (1mk)

(ii) Identify the most soluble dye(1mk)

26. Magnesium burns with a brilliant flame in air forming two main products X and Y, write the equations for the formation of:

(i) X(1mk)

(ii) Y( 1mk)

27. An experiment was set up using chlorine water as shown below

1 Red Yellow Blue 2 3

Ammonia

Air

Red litmus paper

Blue litmus paper

Z

X

Ice

Heat

NaHCO3

(i) Identify gas X (1mk)

(ii) Write an equation for the production of gas X(2mks)

28. Two test tubes one with ammonia and the other with air were set as shown below

(i) Predict the changes that would be seen in the litmus papers (1mk)

(ii) Explain your answer in (i) above(2mks)

29. The isotopes of an element X-16 and X-18 occur naturally in the ratio of 9:1 respectively. Calculate the relative atomic mass of X

(2mks)

30. The diagram below represents the thermal decomposition of sodium hydrogen carbonate

Heat Zinc Nitrate

Gas R

Water

(i) Name X and Z(1mk)

(ii) Write an equation for the decomposition(2mks)

31. Describe how you can distinguish between solutions of Sodium Carbonate and sodium hydrogen carbonate given magnesium chloride solutions (3mks)

32. (a)State Graham’s law of diffusion(2mks)

(b) It takes 245 seconds for nitrogen to diffuse through a membrane. How long will it take an equal volume of Carbon (IV) oxide to diffuse through the same membrane? (N=14,C=12,O=16)(2mks)

33. Study the diagram below and use it to answer questions that follows

(i) Identify gas R (1mk)

(ii) What changes would be reserved in the test-tube (1mk)

(iii) Explain the nature of the solution formed in water after sometimes (2mks)

34. Explain the following observations

(i) electrical conductivity of metals decreases with an in increase in temperature (2mks)

(ii) Ionization energy decreases down the group in group I(2mks)

35. The table below gives some physical properties of substances A,B and C. study it and answer the questions that follow

Substance Colour M.P (oC) Solubility in water

Electrical conductivity Solid Liquid

A Black 114 Insoluble Non Non-

Dil HCl.

Gas Y

Moist red flower petals

Sodium sulphite Heat

conductor conductor B Black 1326 Soluble Non

conductor Decompose

C Black 3730 Insoluble Conducts Conducts (a) Identify the substance that is

(i) Giant atomic structure(1mk)

(ii) Ionic structure(1mk)

(b) Which substance would dissolve in organic solvent? (2mks)

36. The electronic configuration of ions X2+ and Y- are 2.8 and 2.8 respectively

(a) State the group and period in which the elements belongs to (2mks)

X…………………………………………

Y…………………………………………

37. The equation below represents an equilibrium between chromate ions Cr42- and dichromate ions

Cr2O72-

2Cr4O2-(aq)+ 2H+

(aq) Cr2O72- (aq)+H2O(l)

Yellow orange

(a) State what would happen to the position of the equilibrium reaction if dilute sulphuric (VI) acid is added to the mixture. Give a reason for your answer

(2mks)

38. Study the diagram below and use it to answer questions that follows

State and explain the observation that was made

39. The diagram below shows set-up used to burn hydrogen and collect the product

Cold water

Colourless liquid

Combustion tube packed with fused CaCl2

Hydrogen gas

Zinc

Beaker

Acid

Iron

Galvanometer

(a) State why its necessary to dry the hydrogen gas before igniting it (1mk)

(b) (i) State the precaution that must be taken before igniting the hydrogen(1mk)

(ii) State two uses of hydrogen gas(1mk)

40. 15.22 g of the oxide of metal X was formed when 10.64g of X reacted with excess oxygen. Determine the formula of the metal oxide X. (X=56,O=16)

(3mks)

41. M grams of a radioactive isotope decayed to 5 grams in 100 days. The half-life of the isotope is 25 days.

(i) What is meant by half-life of the isotope is 25 days (1mk)

………………………………………………………………………………………………………

………………………………………………………………………………………………………

(ii) Calculate the initial mass of the radio active isotope (2mks)

42. Concentrated hydrochloric acid is used for removing oxides form metals (pickling). Explain why concentrated nitric (V) acid cannot be used for the same purpose

(2mks)

43. (a) Determine the quantity of electricity required to deposit 0.16g of copper metal from copper sulphate solution. (Cu=64, Faraday constant=96500) (2mks)

(b) If 0.16g of copper in (a) above is deposited in one minute, determine the amount of current flowing through the electrolyte (2mks)

44. In the extraction of aluminum, bauxite is dissolved in hot concentrated sodium hydroxide before carbon (IV) oxide is passed through the solution

Basic oxide Acidic

oxide

(a) State the role of sodium hydroxide in the process(1mk)

(b) State the affect of bubbling CO2 into the solution (1mk)

45. The diagram below shows acidic and basic oxides fit into the general family of oxides

.

(i) State the name given to the type of oxides that would be placed in the shaded region (1mk)

(ii) Give the name of any oxide that could be placed in the shaded region(1mk)

46. The table below shows the first ionization energies of elements B and C

Element Ionization energy KJ/molBC

494736

(i) What is ionization energy(1mk) (ii) What do the values suggest about reactivity of B compound to that of C? (2msk)

47. State two factors which determine the stability of an isotope (2mks)

CHINGA BOYS’ HIGH SCHOOLCOMPUTER STUDIES – HOLIDAY ASSIGNMENT 2020

FORM THREE1. (a) Define the term database? 1mk

(b) Give any four examples of database management software (DBMS) available in the market today. 2mks2. Below are two tables structures of files in a database

Employee Field Data type

Employee name TextEmployee Number Auto numberDOB Date/ TimeAddress Text

Employees table Department table(i) Which of the two tables is likely to be the parent table 1mk

(ii) It is advisable to ‘Enforce Referential Integrity’ when creating a relationship, what do you understand

by the term referential integrity? 1mk

(iii) The field ‘Employee No’ In the employee table is likely to be the primary key. What is a primary Key

1mk

(iv) Which fields in both tables is most appropriate for creating a relationship? 1mk

(v) What would make the relationship between the tables fail to work? 2mks

(vi) In databases, the field properties specify finer details related to the fields and the table entries expected. State four field properties.

2mks(vii) State any two functions of a database 2mks

(viii) Explain the following terms as used in database 2mksi. Entity

ii. Record (ix) Mention four database models that you have learnt 2mks (x) Define the following database object 4mks

a. Table b. Queryc. Macrod. Input screen

(xi) Explain any two functions of a primary key 2mks3. a) Define the term mail-merge 2mks

b) Name two files commonly used in mail merge. 2mksc) Name and explain the two types of dropcaps 2mksd) Give a reason for each of the following:-

i. Changing a password regularly; 1mkii. Typing and re-typing a new password when changing it. 1mk

e) List three paragraph formatting features of word processor 3mksf) Describe two uses of a title bar in a document. 2mksg) Differentiate between copy and cut 2mksh) Differentiate between Sentence case and Title case 2mksi) Define the term cropping. 1mkj) Explain any two problems one may encounter while printing a document. 2mks

4. Define the following terms:- 3mks

Employee Field Data type

Employee No Auto NumberDate Employed Date/TimeDepartment Name TextSalary Currency

Mouse Scanner

2 GB HDD

CPU

128 MB RAM

32 MB ROM

Monitor

Speaker

Network

Floppy Drive

CD Drive

Printer

a. Rangeb. Valuec. Function

5. (a) Give any two advantages of electronic spread sheet over manual work 2mks

(b) Define cell referencing? 1mk

(c) Distinguish between a worksheet and a workbook 2mks6. A computer accessories vendor needs to order supplies. A spreadsheet is used to calculate the order part of

which is shown below.A B C D

1 Item Price per unit Number ordered Cost (Kshs)2 56K Modem 8,565.00 603 128 MB RAM 4,950.00 404 Pentium IV Processor 13,525.00 555 Total

a. Write the formula that can be used in:- 2mksi. D2ii. D5

b. If a value added tax (VAT) of 16% was charged on each item and the number ordered was decreased by 10%, write a new formula that can be used in D2. 3mks

7. Study the diagram below and answer the questions that follow.

From the diagram:i. Name two devices that are used for long term storage. 2mksii. Name three peripheral devices shown on the diagram that are used for input. 3mks iii. With reference to quality of print, noise level and cost, compare a dot matrix with a laser printer

2mks.8. Differentiate between Data and Information.                                    1mk9. State two characteristics of a minicomputer. 1mk10. (a) What is a computer bus? 1mrk

(b)  Name and describe 3 types of computer bus.                            3mks 11. Define the following terms: - 3mks

a. Firmware b. Operating systemc. Booting

12. The advertising department has recently purchased an image-editing software package for one of its workstation computers. This computer is accessible to all employees.

a) Identify THREE hardware specification requirements other than RAM which may need to be taken into account before installing the package. 3mks

b) The software package states a minimum hardware requirement of 1GB of RAM. The workstation has 2GB of RAM installed. Explain the benefits of the additional RAM when using this program.

1mk13. Describe the following word processing concepts: - 5mks

i. Creation of a documentii. Saving a document

iii. Editing a document iv. Printing a document v. Retrieving a document

14. With the aid of a simple diagram, describe the general layout of a worksheet (Spreadsheet). 3mks15. Name four career opportunities that are available in the computing field. 2mks16. Differentiate between a device and device driver. 1mk

17. Describe how operating system is used in carrying out the following tasks in a computer:- 4mksa. Maintaining securityb. Multi-tasking c. Error handling d. Processor scheduling

18. List down four formatting activities that can be carried out on a word document. 2mks19. Give two examples of a spreadsheet application and two examples of a database application. 2mks20. What is the BIOS? (1 point for the definition, 2 points for a description of what it does) 3mks(a)  Name and explain the roles of any 2 basic components of a computer system other than storage devices.

2mks (b)  Name three magnetic secondary storage devices.                       11/2mks (c)   What is system software?                                                          1/2mk 

18. (i) The table below shows staff entry in a database. TABLE STAFFName Address Suburb State Salary Postcode Steve Cameron 1 Jordan Place Zetland QLD $85,000 4235Mary Tai 3a Flynn Road Eden NSW $90,000 2490Ashley Lee 1 Jones Street Lavington ACT $75,000 2555Greg Rania 34 Jules Street Muthaiga WA $77,000 6043

(a) How many staff members either live in NSW OR earn greater than $80,000? 1mk(b) The table is to be sorted by the address field in descending order. Which staff member would appear second

from the bottom? 1mk(c) The table needs to be sorted in ascending order according to the staff member’s last name. Describe

modifications to the table to achieve this. 2mks (ii) In the space provided below draw an appropriate data entry form for the staff table. 3mks

(iii) Differentiate between entity integrity and validity integrity. 2mks(iv) Explain ONE advantage of entering data into the form rather than directly into the table. 1mk(v) A diagnostic tool was run on two workstations. The results for each workstation are shown.

(a) Identify from the tables which workstation requires defragmentation. 1mk(b) Outline the processes carried out to defragment a hard disk. 2mks(c) Describe a benefit of defragmenting a hard disk. 2mks(d) Inappropriate usage of computers by staff, including installation of illegal software was identified in a

company audit trail.I. Identify ONE other type of information that can be obtained from an audit trail. 1mk

II. What law does the installation of illegal software breach? 1mk(vi) Give two similarities between optical mark readers and optical character readers 1mk20.  (a)   Distinguish between traditional analysis sheet and electronic sheet. 5mrks 

(b)  With the aid of examples, explain the following spreadsheet cell referencing. 5mrks(i)               Single cell reference (ii)              Range reference (iii)            Mixed cell reference (iv)            Absolute cell referencing (v)              Relative cell referencing 

(c)  Differentiate between a range name and a range address.             1mrk (d)  Use the following spreadsheet segment to answer the questions that follow.

Write down the formulae that can be used to determine.             4mks i. Average of all values 

ii. Determine values greater than 10 iii. Sum of all values iv. Product of all values

21. (a) Perform the following binary arithmetic and give your answers in decimal

WORK STATION 1

Disk capacity 80GB

Used capacity 80%

Free space 20%

WORK STATION 1

Disk capacity 60GB

Used capacity 30%

Free space 70%

notation:(i) 1010.101 + 11.011 ( 3 mks)(ii) 1010.011 – 11.011 ( 3 mks)(b) Covert the following numbers into their binary equivalents(i) 0.562510 ( 3 mks)

22. (i) What is an internet Protocol (IP) address? ( 1 mk)(ii) Why is an IP address necessary? ( 1 mk)(b) What is the purpose of the following internet domains? ( 1 mk)(i) .org(ii) .gov

CHINGA BOYS HIGH SCHOOL FORM 3 2020 DURING C19 HOLIDAY1) State the reading on the micrometer screw gauge shown below. (2mark)

2) An oil drop forms a circular patch of area 5x10-3 m2.If the oil drop has a volume 9x10-12 m3, By stating assumption made calculate the thickness of the oil molecule in standard form (3marks)3) Name two non contact force. (1mark)4) Two table tennis balls are suspended from a support by thin string and air is blown between them. State and explain the motion of the balls. (3marks)5) State the Hooke’s law (1mark)6) Give a reason why heat transfer by radiation is faster than heat transfer by conduction.7) The figure below shows a fire alarm circuit. Explain how the alarm functions. (3marks)

8) State the reason why water spilled on a glass surface wets the surface. (1mark)9) Two liquids of density 1100kg/m3 and 850kg/m3 are mixed in equal volumes .The mixture fills a tank of 300cmx40cmx50cm to the brim. Calculate the mass of each liquid. (3 marks)10) The figure below shows a hydraulic press system using a lever of negligible mass, on the side of the small piston, pivoted at point P. A force of 50N is applied.

10kg

a) Calculate the: i) Force exerted by the small piston on the liquid. (3 marks)ii) Pressure of the liquid below the small piston. (3 marks)iii) Weight of the object supported on the larger piston. (3 marks)iv) determine VR, MA and Effiency of the system. (9 mks)b) State two properties of the fluid used in the hydraulic press. (2 marks)11) a) State three Newton’s second law of motion. (3 marks)b) A body accelerates uniformly from rest to 30m/s in 10s.Find its acceleration. (3 marks)c) A car of mass 800kg moving with a speed of 15m/s crashes into a wall and comes to rest in 0.4 s. Find the i) Impulse (3 marks)ii) Average force by the wall. (3 marks)d) A steel ball is released at the top of a tall glass cylinder containing a viscous liquid. Sketch the velocity –time and momentum- time graph for this motion (2 marks) (a) The figure below shows a body being pulled by a constant force of 14N for a distance of 4m over wooden surface. The co-efficient of friction is 0.03.

14N

Find the : (i) Friction force experienced by mass 10kg. (2 marks) (ii) Acceleration of the body. (2mks)

(iii) Velocity of the body after the 4 metres (2mks) (iv) Momentum of the body after the 4 metres. (2mks)

12) a) State the principle of moments. (1mk) b) A uniform wooden lath measuring 200cm by 25cm by 15cm is suspended at the 150cm mark and balanced horizontally by hanging a mass of 14 kg at the 200cm mark. Calculate the: i) Mass of the wooden lath. (3marks)ii) Density of the material of the wooden lath. (3marks)iii) Tension in the rope supporting the system. (3marks)13) Figure below shows the motion of a trolley on a ticker timer. The ticker has frequency of

50HZ

(a) (i) Calculate the initial velocity between A and B (2 marks)

(ii) Calculate the final velocity between C and D (2 marks)(iii) Calculate the acceleration of the trolley during the motion (3

marks)14) a) Distinguish between E.m.f and potential difference.

(1mark)

b). i) Define the term principal focus of a mirror. ( 2marks)ii) A concave mirror has a focal length of 50 cm. An object of height 12 cm is placed at the front of the mirror. Determine the height of the image formed (3 marks)

c) State and explain what will happen to the leaf when a negatively charged rod is brought near the cap of a negatively charged gold leaf electroscope. (2 marks)

15. The water level in a burette is 30.6 cm3. 100 drops of water each of volume 0.05 cm3are dropped from the burette. What is the final reading of the burette? (2mks)16. In an experiment to determine the density of a liquid, the following readings were made; Mass of empty density bottle=30 g, Mass of bottle filled with water = 80 g, Mass of bottle filled with a liquid = 60 g Find the density of the liquid, given that density of water is 1000kgm-3 (4 marks)17. An object weighs 49N on earth where acceleration due to gravity is 9.8N/kg. Find the acceleration due to gravity on another planet where the same object weighs 40 N. (3 marks)18. A drop of oil has a volume of 3.0 x 10-6m3 and spreads to form a patch of radius 14 cm on the surface of water. Determine the thickness of the oil patch. (3 mks)19. State two advantages of mercury over alcohol as a thermometric liquid. (2 mks)20. A hole of area 5.0cm2 at the bottom of a closed tank 4m deep is closed with a cork. Determine the force on the cork when the tank is filled with water. (Take g = 10N/kg and the density of water = 1000kgm-3) (3mks)21. Figure shows two identical thermometers A. Thermometer A has a blackened bulb while thermometer B has a silvery bulb. A heater is placed equidistant between the two thermometers.

State with reasons the observations made after some time. (3mks)22. State one way of making surface tension of water weaker. (2mks)23. .(a)State two conditions necessary for an object to be in equilibrium. (2 marks

a) The figure below shows a uniform metal rod of mass 100g balanced over a pivot using a

spring balance and a mass of 300g.

Calculate the tension in the spring. (3marks)24. State two major defects of a simple cell. (2mks)25. (a) Study the circuit shown below.

State and explain what happens to the identical lamps X and Y in the circuit shown when(i) Switch S1 only is closed (2mks)

100cm70cm20cm0cm

Spring 300g

8N

(ii) Switches S1 and S2 are closed (2mks)26. Draw the magnetic field lines due to the configuration shows below (2mks)

27. State two factor to be considered when selecting the instrument to be used to measure length. 2mks

28. A hydraulic jack has an effort piston of cross-section area of 200mm2 and load pistons of cross section area of 100cm2 calculate the force required to raise a load of 1600N. (3 marks)29. State and explain the effect of heating a metal bar on its density. (3 marks28. Give two differences between images formed by pinhole camera and those formed by convex mirrors. (2marks)29. A conductor is slowly brought near the cap of negatively charged electroscope. The leaf first collapse and then diverges.

(i)State the charge on the conductor (1 mark)(ii)Explain the observation. (2marks)

30. a) State one way in which a racing car is designed to maintain stability. (1 mark)(b) A uniform meter rule of negligible weight is balanced by weights 0.3N and 0.2N suspended from its ends. Find the position of its pivot. (3 marks)31. a) Define the term principal focus as used in curved mirrors (2 marks)(b) A concave mirror of focal length 15.0cm produces a virtual image on its axis 10.0cm from the mirror. Determine the position of the object. (3 marks)32. Water flowing with a velocity of 25m/s in 9cm diameter enter a narrow pipe of diameter 3cm. calculate the velocity of the water in the narrow pipe. (3 marks33. a) Water waves were observed as they pass affixed point at rate of 15 crests per minute. A

particular wave crest takes 3.0 seconds to travel between two fixed points 6.0cm apart. Determine: The frequency i) Wavelength

(3marks(b) An echo sounder of a ship received the reflected waves from a sea bed after 0.20s. (i) Determine the depth of the sea bed if the velocity of sound in water is 1450m/s (2marks) (ii)When the ship above passes over a sunken reef, the echo sounder receives an echo after 0.1 6s.Determine the height of the sunken reef (3marks)34. A charge of 120 coulombs flow through a lamp every minute. Calculate the current flowing

through the lamp. (3mks)35. (a) State Hooke’s Law. (1mk)

b) State two factors that affect the spring constant (2mks)c) Three identical spring each of springs constant 10Nm-1 and weight 1N are used to support

a load of 8N as shown

Determine the total extension of the system. (3mks)

N SSoft iron