Science Questions and Answers - Class 8 End Term 2 Exam 2021 Set 1

1. Which group below consists only of legal drugs in Kenya?
   
   1. Khat, alcohol, tobacco
   2. Bhang, cocaine, mandrax
   3. Tobacco, inhalants, miraa 
   4. Cocaine, tobacco, bhang
2. Which one of the following is a common sign between symptomatic and incubation stages of HIV infection? At both stages
   
   1. the patient can transmit the virus knowingly
   2. the patient has AIDS
   3. signs and symptoms are visible 
   4. a HIV test shows negative results.
3. The chart below shows immunisation schedule for infants.
   
   Which pair of vaccines below are not all correctly classified?
   1. BCG and Hepatitis B 
   2. 3^rd OPV and 1^st DPT
   3. Hepatitis B and 2^nd DPT 
   4. 1^st DPT and 1^stOPV.
4. Which one of the following is not an interdependence between plants?
   
   1. Habitat 
   2. Shade 
   3. Food 
   4. Shelter
5. All the following plants have the same type of root except
   1. sweet potatoes
   2. banana 
   3. mango 
   4. irish potatoes.
6. Some pupils destroyed all the anthers in a certain flower before pollination. Which one of the following is most likely to take place after some time in the same flower?
   1. The ovary developed into a fruit 
   2. Pollination did not take place 
   3. Pollen tube did not develop 
   4. The whole flower withered.
7. The diagram below shows a method of separating mixtures.
   
   Which mixture below cannot be separated using the above method?
   1. Maize and millet
   2. Wheat flour and husks 
   3. Rice and sand particles
   4. Sorghum and beans.
8. The following are signs and symptoms of a certain water-borne disease;
   1. Blood in urine 
   2. Fever 
   3. Diarrhoea or constipation
      Which one of the following is the best method of preventing the above disease?
      1. Wearing protective clothing when handling stagnant water. 
      2. Maintaining high standards of hygiene
      3. Vaccination against the disease during outbreak.
      4. Drinking boiled or treated water.
9. Which method of food preservation below makes the bacteria inactive?
   1. Canning 
   2. Freezing
   3. Salting
   4. Drying
10. All the following are importance of water in a diet except
    1. helps in food absorption
    2. helps in removal of waste products 
    3. water forms part of blood 
    4. prevents constipation.
11. Which one of the following is not a major protective food?
    1. Milk 
    2. Pumpkin
    3. Mutton
    4. Kales
12. On a very cold day, a boy covered himself with a blanket. The main function of the blanket was to
    1. provide him with warmth 
    2. produce enough heat 
    3. allow his body to generate heat
    4. reduce heat loss from his body.
13. In between a burning jiko and a boy standing close to the jiko there is air. Heat from the jiko mainly reaches the boy through
    1. radiation only
    2. convection only
    3. conduction only
    4. convection and radiation.
14. Which one of the following is not a reason for lighting a room?
    
    1. To improve safety 
    2. To provide warmth 
    3. To see clearly 
    4. To discourage pests.
15. In which of the following activities is water least conserved?
    
    1. Discharging treated sewage into water ways. 
    2. Providing shade to growing seedlings
    3. Channeling rain water into a dam 
    4. Cultivating close to river banks
16. Which set up below is used to investigate refraction of light?
    
17. A class four pupil placed a ball bearing and a metallic bowl on water. After the observation, the pupil concluded that
    1. size does not affect floating and sinking 
    2. type of the material affects floating and sinking 
    3. shape of an object affects floating and sinking
    4. weight does not affect floating and sinking.
18. The following are the steps to following when investigating if part of air supports burning
    1. Pour water into the basin 
    2. Cover the burning candle with a glass jar
    3. Fix the burning candle at the bottom of the basin using wax
       Which one of the following shows the correct procedure?
       1. ii, ii, i 
       2. ii, iii, i 
       3. i, ii, iii 
       4. iii, i, ii
19. In which of the following is friction force least required?
    1. Running
    2. Flying a kite 
    3. Cycling
    4. Digging
20. Which one of the following is not a common characteristic between the vertebrates drawn.
     
    
    1. They breathe through lungs 
    2. They have constant body temperature
    3. They have internal fertilisation 
    4. They lay eggs.
21. Ticks and tapeworms in livestock can both be controlled by
    1. deworming 
    2. dipping 
    3. practising rotational grazing
    4. spraying the livestock with acaricides.
22. Which one of the following farm animals can produce both beef and milk?
    1. Dairy cows
    2. Goats
    3. Sheep
    4. Poultry
23. The best method a person infected with tuberculosis can prevent the spread of the disease is by
    1. immunisation against the disease 
    2. isolation and immediate treatment
    3. living in a well ventilated room 
    4. drinking properly boiled milk.
24. Which one of the following is not a myth and misconception about HIV/AIDS?
    1. People living with HIV/AIDS are always thin.
    2. All people with HIV have AIDS 
    3. HIV is caused by sexual intercourse
    4. HIV/AIDS weakens the body's immunity.
25. Which group of crops below are correctly classified?
    1. Oil crops - sunflower, coconut and cotton
    2. Cereals - maize, sorghum and peas
    3. Fibre crops - sisal, barley and cotton 
    4. Tubers - onions, cassava and potatoes
26. Which one of the following is not a physical change in adolescent girls?
    1. Rapid body growth 
    2. Hair grows on chest 
    3. Pimples may appear on the face
    4. Hips broaden.
27. The diagram below shows the parts of the urinary system.
    
    Which letter represents the part that produces urine?
    1. W
    2. Z
    3. X
    4. Y
28. Which blood vessel transports blood from,the lungs to the heart?
    1. Pulmonary vein
    2. Aorta 
    3. Pulmonary artery
    4. Venacava.
29. Which type of teeth is one not likely to use when eating sugarcane?
    1. Incisors 
    2. Molars 
    3. Premolars 
    4. Canines
30. Which type of manure is prepared from all forms of organic waste?
    1. Farmyard manure 
    2. Green manure 
    3. Compost manure 
    4. Artificial manure
31. The diagram below shows a way of grazing animals.
    
    Which statement is false about the above method of grazing?
    1. It can best be used with few livestock 
    2. The livestock can only feed on pasture
    3. It helps in controlling livestock parasites 
    4. It is a type of rotational grazing.
32. In which part of the digestive system is water absorbed?
    1. Mouth 
    2. Stomach
    3. Large intestine
    4. Small intestine
33. Which one of the following substances does not have indefinite shape?
    1. Ice
    2. Water 
    3. Oxygen
    4. Smoke
34. Which of the following instruments is used to compare the quantity of matter in objects?
    1. Spring balance
    2. Beam balance
    3. Kilograms 
    4. Newtons
35. The gravitational pull in an object is equivalent to its
    1. mass
    2. inertia 
    3. friction 
    4. weight
36. Two liquids were mixed in a container as shown below.
    
    Liquid E and F are most likely to be _______ and _______ respectively.
    1. water, kerosene 
    2. milk, methylated spirit 
    3. methylated spirit, petrol 
    4. petrol, milk
37. What is the percentage of the gas that is used by some green plants to make protein?
    1. 0.03%
    2. 0.97% 
    3. 21%
    4. 78%
38. Which one of the following is not a major component of the environment?
    1. Water 
    2. Animals
    3. Light
    4. Soil
39. The following are all signs and symptoms of marasmus except
    1. wrinkled skin 
    2. severe loss of weight 
    3. sores at the corner of the mouth 
    4. almost all the muscles disappear.
40. All the following materials are required when modelling the solar system except
    1. bottle tops 
    2. manila paper 
    3. thorns 
    4. plasticine. .
41. The arrow of a windvane was seen pointing towards the direction of the sunset. From which direction was the wind blowing?
    1. East
    2. North 
    3. West 
    4. South
42. Which type of soil is correctly matched to its characteristics in the table below?
    

    	Clay	Sand
    A.  B.  C.   D.	Largest particles   Spreads easily when dry  Has poorest capillarity   Cracks when dry	Makes shortest ribbons    Sticks when wet  Retains a lot of water  Has best drainage

43. All the following animals live in soil except
    1. ants
    2. moth
    3. millipede
    4. slug.
44. Which one of the following is not a storage pest?
    1. Mite
    2. Weaver bird
    3. Mole
    4. Weevil
45. The diagram below shows the development of the foetus in the womb.
    
    Which letter represents the part that is correctly matched to its function?
    1. T-allows for free movement of the foetus 
    2. Q - protects the foetus from injuries
    3. R - prevents direct contact of blood 
    4. S-facilitates transfer of food nutrients,
46. Which one of the following sources of electricity is odd?
    1. Bicycle dynamo 
    2. Wind - driven turbines 
    3. Solar panels 
    4. Petrol - driven generators.
47. Which lever below has effort between ioad and fulcrum?
    1. Wheelbarrow
    2. Claw hammer 
    3. Crowbar 
    4. Spade
48. Which one of the following is not a use of water in the farm?
    1. Watering plants
    2. Cooling parts of machines
    3. Washing farm tools 
    4. Keeping some farm animals.
49. Which material below is a poor conductor of electricity?
    1. Rubber band 
    2. Pin
    3. Razor blade 
    4. Staples
50. Which one of the following is not a commercial feed?
    1. Maize germ 
    2. Pollard
    3. Molasses
    4. Desmodium.

MARKING SCHEME

1. A
2. A  
3. D
4. D
5. B
6. A
7. C
8. B
9. B
10. D
11. C
12. D
13. A
14. B
15. A
16. C
17. C
18. A
19. B
20. D
21. C
22. A
23. B
24. D
25. A
26. B
27. A
28. A
29. A
30. C
31. B
32. C
33. A
34. B
35. D
36. D
37. D
38. C
39. C
40. A
41. C
42. D
43. B
44. B
45. A
46. A
47. D
48. B
49. A
50. D