Science Questions and Answers - KCPE 2022 Past Papers

Questions

1. Which one of the following describes decidous teeth? They are
   1. milk teeth
   2. Wisdom teeth
   3. permanent teeth
2. Which one of the following develops immediately after fertilisation in human beings?
   1. Foetus
   2. Embryo
   3. Zygote
   4. Placenta
3. The function of the large intestine in the human digestive system is to
   1. store food
   2. absorb food
   3. absorb water
   4. produce bile
4. Which one of the following is the largest component of the human blood?
   1. White blood cells
   2. Red blood cells
   3. Platelets
   4. Plasma
5. The diagram below represnt a section of the human circulatory system
   Which one of the following correctly represents the blood vessels labelled (i),. (ii), (iii) and (iv) respectively?
   1. Pulmonary vein, Aorta, Pulmonary artery, vena cava
   2. Aorta, Pulmonary artery, vena cava, Pulmonary vein
   3. Vena cava, Pulmonary artery, Pulmonary vein, Aorta
   4. Pulmonary artery, vena cava, Pulmonary vein, Aorta
6. Which one of the following statements about HIV is true? HIV is
   1. treated through early vaccination
   2. prevented by bathing with soap
   3. spread through blood transfusion
   4. detected during the window period
7. Which one of the following stores energy in the same way as a dry cell?
   1. Charcoal
   2. Dynamo
   3. Geothermal generator
   4. Solar panel
8. The following diseases are immunisable except
   1. tuberculosis
   2. bilharzia
   3. diphtheria
   4. typhoid.
9. The following are some ways of preventing common communicable diseases.
   1. clearing bushes around the home 
   2. covering the mouth when coughing 
   3. isolating infected persons
   4. draining stagnant water
      
      Which two are for preventing malaria?
      1. (i) and (ii).
      2. (ii) and (iii).
      3. (iii) and (iv).
      4. (i) and (iv).
10. The following are proper ways of storing medicines at home except
    
    1. locking them in a cupboard
    2. keeping them in a transparent container
    3. keeping them in a cool place.
    4. labelling the containers.
11. Which one of the following statements about gonorrhoea is correct? It causes
    1. a painful rash on the whole body
    2. production of pus from the urethra
    3. a sore on the penis
    4. irritation in the pubic area.
12. Which one of the following sets of conditions will make healthy seeds germinate?
    
    1. Warmth, carbon dioxide and moisture. 
    2. Oxygen, carbon dioxide and light.
    3. Moisture, oxygen and warmth.
    4. Light, oxygen and moisture.
13. The chart below represents a simple classification of crops.
    The crops represented by (i), (ii), (iii) bus and (iv) are 
    

    	(i)	(ii)	(iii)	(iv)
    A	Greengrams	Rice	Cocoa	Pawpaw
    B	Carrots	Mango	Tea	Cotton
    C	Cassava	Orange	Sunflower	Coffee
    D	Sorghum	Peas	Cotton	Groundnuts

14. Which one of the following is not an important consideration when giving medicine?
    1. The quantity to be taken.
    2. Date of manufacture.
    3. Duration of the dose.
    4. Taste of medicine.
15. The diagram below represents parts of a flower labelled E, F, G and H.
    The part that receives pollen grains during pollination is
    1. E
    2. F
    3. G
    4. H
16. Which one of the following plants has the same type of roots as the bean plant?
    1. Napier grass
    2. Cowpeas
    3. Maize
    4. Wheat
17. Which one of the following statements describes the m,eaning of fertilisation in plants? It is
    1. joining together of the male and female cells
    2. growing of the pollen tube to the ovary
    3. transfer of pollen by bees
    4. formation of a seed.
18. Which one of the following pairs of animal feeds consists only of pasture?
    1. Sorghum and sweet potato vines
    2. Sorghum and desmodium
    3. Sweet potato vines and star grass
    4. Star grass and desmodium
19. The chart below shows a simple classification of vertebrates into different groups
    
    Which of the following pairs of animals correctly represents the groups labelled W and Y
    

    	W	Y
    A	Shark	crocodile
    B	Newt	gecko
    C	Chicken	toad
    D	Whale	salamander

20. Which one of the following is common in fish, reptiles and amphibians?
    1. Presence of scales
    2. Presence of gills
    3. Varying body temperature
    4. External fertilisation
21. The diagram below represents part of a certain bird
    
    The bird most likely feeds on
    1. fish
    2. nectar
    3. insects
    4. seeds
22. The diagram below represents an improvised liqid thermometer
    
    Which one of the following imporvements would make the instrument measure changes in temperature?
    1. A narrower straw
    2. coloured water
    3. a plastic bottle
    4. a large bottle
23. A person was wearing a light shirt and open shoes. The weather conditions were likely to be
    1. cold and windy
    2. hot and windy
    3. cold and wet
    4. hot and dry.
24. Which one of the following pairs of sources of water will only provide hard water?
    1. Rain and well.
    2. Spring and boiler
    3. Well and spring
    4. Rain and river
25. The following are activities that can help to conserve soil except
    1. ploughing down the hill
    2. mulching with dry grass
    3. planting sweet potato vines
    4. dumping vegetable waste in the gardens.
26. Which one of the following would a farmer use to store large volumes of water?
    
    1. Drum.
    2. Tank.
    3. Pot.
    4. Dam
27. Which of the following consists only of a pair that can make pond water safe for drinking?
    
    1. Addition of chemicals and filtration
    2. Decantation and boiling.
    3. Boiling and addition of chemicals.
    4. Filtration and decantation.
28. Discolouring of white garments during washing can be minimised by using
    
    1. soapy borehole water
    2. warm rain water
    3. soapy spring water
    4. warm borehole water.
29. Which one of the following practices to help to prevent the spread of cholera?
    1. Keeping cooked food covered.
    2. Wearing gumboots when working in a swamp.
    3. Washing hands after eating.
    4. Eating roasted maize by the roadside.
30. Deep trenches were observed on a farm on a hillside. The deep trenches weremost likely due to
    1. splash erosion
    2. gulley erosion
    3. rill erosion
    4. sheet erosion.
31. The soil in which water rises least also
    1. makes long ribbons
    2. is rich in minerals
    3. has large particles
    4. has smooth texture.
32. Which one of the following statements is correct about farmyard manure? They
    1. are made from plant and animal waste
    2. contain one micronutrient
    3. pollute the soil when in excess
    4. do not add organic matter to the soil.
33. Which one of the following groups consist only of food that are used in body building and repair?
    1. Rice, oranges, beef.
    2. Wheat, fish, maize.
    3. Eggs, beans, milk.
    4. Beans, potatoes, groundnuts.
34. Which one of the following statements correctly describe smoking of meat? The meat is
    1. dried using hot air over open fire
    2. placed on a layer of salt
    3. spread over hot charcoal
    4. placed on a hot pan.
35. The main reason why a lactating mother needs a balanced diet and plenty of fluids is for
    1. formation of strong bones in the baby
    2. protection of the baby against diseases 
    3. increasing the production of milk
    4. replacement of blood lost during birth
36. Which one of the following materials can allow a person to see through?
    
    1. Clear water.
    2. Mirror.
    3. Frosted glass.
    4. Milk.
37. Pieces of paper placed over a fire move upwards because because
    
    1. they are light 
    2. hot air rises 
    3. of radiation
    4. of heat.
38. In which one of the following pair of processes is heat absorbed from the surroundings? 
    1. Condensation and evaporation.
    2. Freezing and condensation.
    3. Melting and freezing.
    4. Evaporation and melting.
39. In an investigation liquid X was found to be denser than liquid Y but less dense than liquid Z. The three liquids are immiscible.
    The diagram that represents the correct observation when the three liquids are put in the same container is
    
40. A bowl made of iron may float when placed on water because of the
    1. mass
    2. shape
    3. size
    4. material
41. The diagram below represents a demonstration of a certain property of light.
    
    The diagram shows that light
    1. travels in a straight line
    2. bounces back
    3. can be split
    4. apparently bends.
42. In which one of the following pairs of activities is light used?
    1. Drying grains; making plant food
    2. Making plant food; using a solar cooker
    3. Using a solar cooker; drying grains
    4. Keeping pests away; drying grains
43. The diagram below represents a simple electrical circuit with a gap at X.
    
    Which one of the following materials when used to close the gap would make the bulb to light?
    1. Biro pen casing.
    2. Steel nail.
    3. Glass rod.
    4. Wooden rod.
44. Which one of the following statements describe energy?
    1. Ability to do work.
    2. Moving objects from one point to another.
    3. Pushing or pulling an object.
    4. A force acting on an area.
45. Which one of the following materials 84 can be separated using a magnet?
    1. Piece of steel wool and flour.
    2. Cement and wood ash.8
    3. Iron nails and steel pins.
    4. Salt and sugar.
46. When a school bell is rung, everybody in the school hears the sound. This is because sound
    1. travels in air
    2. produced is special
    3. is reflected by obstacles
    4. travels in all directions.
47. The diagram below illustrates working of a certain type of pulley.
    
    The diagram shows that effort
    1. moves a longer distance than the load
    2. required is half that of the load
    3. moves in an opposite direction to that of the load
    4. and the load are not equal.
48. Which one of the following is not a method of maintaining simple tools?
    1. Proper storage.
    2. Sharpening.
    3. Cleaning before use.
    4. Proper use.
49. Which one of the following activities reduces friction?
    1. Re-treading tyres of motor vehicles.
    2. Streamlining shapes of objects.
    3. Drying moving parts of machines.
    4. Making a surface rough.
50. The following are activities observed in a certain town.
    1. servicing of motor vehicles
    2. planting of trees
    3. burying plastics
    4. using farm chemicals to control weeds
       Which two activities help in controlling air pollution?
       1. (i) and (ii).
       2. (ii) and (iii).
       3. (iii) and (iv).
       4. (i) and (iv).

Marking Scheme