Science Questions and Answers - Class 8 Term 2 Opener Exams 2022 Set 2

QUESTIONS

1. Which of the following is false about arteries? 
   1. Have thick walls 
   2. Have pulse 
   3. Blood flows in them under high pressure 
   4. Carry blood to the heart
2. Which one of the following consists of minor components of the environment only? 
   1. Heat, sound, light 
   2. Water, heat, air 
   3. Water, air, soil 
   4. Light, animals, plants
3. The force of friction might be useful in the following activities except in
   1. drawing 
   2. walking 
   3. riding a bicycle 
   4. using a pulley
4. Grade 4 pupils collected the following materials during their Science lesson:
   1. Soil
   2. Test tubes
   3. Candles
      They were likely investigating 
      1. water in the soil 
      2. humus in the soil 
      3. air in the soil 
      4. living organisms in the soil

The diagram below is used to demonstrate a certain property of matter

5. A drop in the level of water in the narrow tube was as a result of
   1. Expansion of the liquid
   2. expansion of the air 
   3. contraction of the air
   4. contraction of the liquid
6. Which one of the following pairs of nutrients constitutes most essential in commercial animal feeds? 
   1. Protein and vitamins 
   2. Minerals and roughages 
   3. Fibre and carbohydrates
   4. Water and proteins
      Grade 5 pupils wanted to make a raingauge. They collected the following materials:
      1. Measuring jar
      2. Stopper
      3. Tin can
      4. Funnel
      5. Thin tube
7. Which of the following items collected were not necessary for their assembly?
   1. (ii), (iv)
   2. (iii), (v) 
   3. (i), (iv)
   4. (ii), (v)
8. An athlete uses the type of shoe shown below
   Spikes were fitted to help the runner by
   1. increasing the stepping area 
   2. decreasing friction 
   3. allowing breaking 
   4. holding firmly on track
9. Which one of the following is an artificial method of lighting a house?
   1. Windows 
   2. Bulbs that use H.E.P electricity 
   3. Transluscent roofs 
   4. Large doors
10. Which one of the following functions is performed by all stems? 
    1. Transportation of food and minerals 
    2. Food manufacturing 
    3. Protection of the plant 
    4. Storage of food and water
11. Which one of the following is true of animals? They all 
    1. give birth to live young ones 
    2. have mammary glands 
    3. locomote 
    4. live on land
12. Which pair contains drugs that are legalised in Kenya? 
    1. Bhang and alcohol 
    2. Heroin and khat 
    3. Khat and tobacco 
    4. Cocaine and alcohol

Use the diagram below to answer questions 13 and 14

13. Which one of the following is the main function of the part marked M? 
    1. Removal of waste products from the foetus to the mother. 
    2. Acting as a shock absorber 
    3. Nourishing the foetus 
    4. Facilitating the exchange of oxygen from the mother to the foetus.
14. Which part in the diagram above carries oxygenated blood and nutrients from the placenta to the foetus?
    1. M
    2. P
    3. O
    4. N
15. Which one of the following pairs consists of parasites that are found in the small instestines?
    1. Liverflukes and tapeworms 
    2. Lungworms and roundworms 
    3. Tapeworms and round worms 
    4. Lungworms and liverflukes
16. Which of the following is the last stage during the birth process? 
    1. Tying and cutting of umbilical cord 
    2. Contraction of uterine walls
    3. Amniotic sac breaks and releases the amniotic fluid 
    4. Release of the afterbirth
17. Which vaccines are giren to a child orally and on the left lower arm respectively?
    1. B.C.G, polio
    2. Yellow fever,PT
    3. Polio, B.C.G
    4. DPT, measles
18. The following measures were taken to prevent a certain disease:
    1. Proper disposal of waste
    2. Keep toilets and latrines clean
    3. Wash fruits thoroughly before eating
    4. Drain stagnant water
       Which of the four can best prevent typhoid?
       1. (i)
       2. (ii) 
       3. (iii)
       4. (iv)
19. Which one of the following is not a safety measure while handling chemicals at home? 
    1. Store chemicals out of children's reach 
    2. Store chemicals on the table, not the floor 
    3. Do not put chemicals in soda bottles
    4. Store chemicals in a lockable cabinet
20. Which one of the following standard weights can be used on a weighing scale to measure one kilogram of meat?
    1. Two 500g standard weights 
    2. Two 1kg standard weights 
    3. Two 100g standard weights
    4. Two 200g standard weights
21. Roots of a plant do all the following except 
    1. storage of food 
    2. absorption of mineral salts 
    3. making of food 
    4. support the plant in the soil
22. Pupils grouped materials as follows.
    Which pair of materials were correctly grouped?
    

    Good conductors of heat	Poor conductors of heat
    A.Copper  B. Plastic C. Aluminium D.Glass	wood glass iron wood

23. The main reason why the government has banned the use of plastic bags is because plastic bags
    1. are expensive to import 
    2. are difficult to recycle 
    3. are a threat to the soil 
    4. pollute air and water
24. Which of the following are the third, fifth and seventh planets from the sun respectively? 
    1. Earth, Jupiter, Uranus 
    2. Mars, Uranus, Neptune 
    3. Earth, Saturn, Uranus 
    4. Mercury, Jupiter, Neptune
25. Soil that cracks easily when dry is known for all the following characteristics except 
    1. good drainage 
    2. fine soil particles 
    3. very sticky when wet
    4. easily rolls into a ribbon
26. Which one of the following is not in the excretory organ? 
    1. Kidneys
    2. Anus 
    3. Skin
    4. Lungs
27. Curative drugs are mainly taken to 
    1. prevent people against diseases
    2. treat known diseases 
    3. protect children against childhood diseases 
    4. stimulate people
28. Which one of the following is not part of the solar system? 
    1. Planets
    2. Moon 
    3. Sun
    4. Stars
29. Repairing leaking taps specifically helps in 
    1. re-using water well
    2. harvesting rain water
    3. using water sparingly 
    4. recycling water
30. Which of the following is not a use of transluscent materials? They are used in making 
    1. sky lights 
    2. bathroom window panes 
    3. vehicle windscreens 
    4. ambulance window panes
31. Which one of the following is the strongest form of static electricity? 
    1. Lightning 
    2. Electric shock 
    3. Charged balloons 
    4. Hydroelectric power

The diagram below represents a simple machine.

32. Which of the following positions labelled W, X, Y and Z represents the load distance? 
    1. Y, Z
    2. X,Y 
    3. X, Z
    4. W,Z
33. Which one of th following changes takes place during adolescence in girls only? 
    1. Releasing of sex cells
    2. Fast body growth
    3. Growth of hair in pubic area 
    4. Widening of hips

Study the food chain below:
Plants → mice → snakes → hawks

34. What is not likely to happen if all snakes die?
    1. Plants will increase 
    2. Hawks will eat mice 
    3. Hawks will starve
    4. Mice will increase
35. Which one of the following lists does not contain foodstuffs that provide the same nutrients?
    1. Maize, wheat, rice, millet 
    2. Meat, eggs, beans, peas 
    3. Beans, peas, groundnuts, blackbeans
    4. Milk, eggs, rice, mutton
36. Pressure in liquids can be increased by
    1. changing depth 
    2. lifting the container 
    3. adding water 
    4. enlarging the container

Grade 5 pupils poured water into different containers as shown in the following diagrams

37. Which one of the following is true about what the pupils were investigating?
    1. Density in liquids depends on the container 
    2. Liquids take the shape of the container 
    3. Pressure in liquids changes with the container 
    4. Mass of the material changes with the container
38. Which one of the following behaviours of light would make an object in water appear bigger than it really is?
    1. Splitting of light 
    2. Dispersion of light
    3. Refraction of light SED.
    4. Reflection of light
39. Which one of the following is not a source of useful electricity? 
    1. Hydroelectric generators 
    2. Torch cell
    3. Geothermal generators
    4. Lightning
40. Which one of the following can not be done using force? 
    1. Slowing down motion 
    2. Speeding up motion 
    3. Determining motion
    4. Starting motion 
41. The ability of two liquids to mix depends on
    1. density
    2. amount 
    3. colour
    4. pressure

Below are characteristics of a certain animal:

1. It lays eggs
2. its body is covered with scales
3. It breathes through lungs
4. Its body temperature varies with that of the surrounding

42. Which of the following animals can not be put in the same group with the animal having the characteristics above?
    1. Snake
    2. Salamander 
    3. Gecko
    4. Crocodile
43. Which of the following is the main advantage of using organic mulch on a farm? To
    1. prevent soil erosion 
    2. prevent weeds from growing by suffocation
    3. conserve soil moisture
    4. enrich the soil with nutrients 
44. All the following are immunisable diseases except
    1. polio
    2. tetanus 
    3. measles
    4. malaria
45. Which one of the following is incorrect about HIV and AIDS?
    1. It is caused by a virus 
    2. It can be spread by insect bites 
    3. It is a fatal disease 
    4. It infects children and adults

The diagram below shows the composition of air

46. The gas marked S is used in
    1. breathing 
    2. fire extinguishers 
    3. electric bulbs
    4. germination 
47. All the following are precautionary measures during lightning. Which one
    1. Not leaning on walls 
    2. Avoid walking bare foot 
    3. Not holding metallic objects
    4. Avoid wearing a red cap
48. Weight is a force. It is measured using a 
    1. spring balance 
    2. beam balance
    3. wagning balance 
    4. see saw
49. When preparing compost manure, what is the main purpose of soil layer? To
    1. add nutrients 
    2. prevent water loss 
    3. introduce bacteria
    4. speed up decomposition
50. The tooth shown below is used for
    
    
    1. crushing and tearing 
    2. holding and gripping 
    3. grinding and biting 
    4. chewing and crushing

MARKING SCHEME