Science Questions and Answers - Class 8 Opener Exams Term 2 2023 Set 5

QUESTIONS

1. A card with the word BLOCK written on it was placed infront of a mirror. Which one of the following shows the correct image that was seen in the
   mirror?
   
2. Which one of the following is not a special sound?
   1. Car hooting.
   2. Bell ringing.
   3. Ambulance siren.
   4. Goats bleating.
3. The method used in separating a mixture of a liquid and a solid depends on
   1. solubility of the solid
   2. the mass of the solid
   3. the mass of the liquid
   4. size of the particles of the solid.
4. The following are natural sources of light except 
   1. fire flies
   2. sun
   3. electricity
   4. stars.
5. A child who appears old with wasted muscles is also likely to
   1. have knock-knee legs
   2. have swollen abdomen
   3. cry often
   4. lack adequate blood.
6. Which one of the following soil conservation measures conserves soil by retaining moisture and soil P.H?
   1. Mulching.
   2. Contour farming.
   3. Use of check dams.
   4. Terracing.
7. The following are non-renewable sources of energy except
   1. petrol
   2. firewood
   3. kerosene
   4. coal.
8. All the following are ways of reducing friction except
   1. treading
   2. streamlining
   3. lubrication
   4. using ball bearings.
9. All the following materials are magnetic. Which one is not?
   1. Steel wool.
   2. Aluminium foil.
   3. Office pins.
   4. Chromium wire.
10. The component of air in the atmosphere that is fixed by bacteria in root nodules to make nutrients is
    1. carbondioxide
    2. inert gas
    3. oxygen
    4. nitrogen.
11. The set up below was used to investigate a certain property of air.
    
    Which property was being investigated?
    1. Air has weight.
    2. Air expands on heating.
    3. Air occupies space.
    4. Air condenses on cooling.
12. The diagram below represents a set up used to investigate a certain aspect of light.
    
    The aspect being investigated is
    1. how light travels 
    2. refraction of light
    3. reflection of light
    4. making a rainbow.
13. Which pair of planets below consists of the farthest and closest planets from the sun respectively?
    1. Venus and Uranus.
    2. Neptune and Mercury.
    3. Mercury and Neptune.
    4. Jupiter and Venus.
14. Which one of the following statements on interdependence between plants is not true? Some plants
    1. grow on dead plants
    2. depend on others for support
    3. depend on others for shade
    4. depend on others for carbondioxide.
15. Which of the following statements is true about clay soil?
    1. Has good aeration.
    2. Has large soil particles.
    3. Retains low amount of water.
    4. It has high capillarity.
16. Which of the following materials are correctly grouped?
    

    	Objects that sink	Objects that float
    A	Nail, wood	Metal dish, stone
    B	Needle, steel rod	Wax, wood
    C	Piece of glass, stone	Rubber, nail
    D	Aluminum plate, pencil	Plastic bag, feathers

17. Class four pupils placed fresh garden soil in a glass bottle containing water, shook it and allowed it to settle. Which of the following components of soil were they investigating?
    
    1. Air in soil.
    2. Living organism.
    3. Water in soil.
    4. Mineral particles in soil.
18. The diagram below shows a root of a certain plant.
    
    Which of the following plants have similar roots like the one above?
    1. Groundnuts and beans.
    2. Maize and sorghum.
    3. Sugarcane and Mango tree.
    4. Onions and millet.
19. Which one of the following is the largest component of the environment the earth's surface?
    1. Soil
    2. Water
    3. Air
    4. Plants.
20. The chart below shows a simple classification of drugs.
    
    Parts X and Y respectively represents
                X             Y
    1. Cocaine    Beer
    2. Bhang      Tobacco
    3. Cocaine   Tobacco
    4. Alcohol     Bhang
21. Which one of the following animal parasites affect sheep and goats only?
    1. Tapeworms
    2. Hookworms
    3. Lungworms
    4. Liverflukes.
22. The diagram below shows a maize seed.
    
    Which part makes the embryo of the seed?
    1. S
    2. Y
    3. X
    4. Z
23. When breathing in
    1. the diaphragm flattens
    2. pressure in the lung cavity increases
    3. the ribcage moves downwards and outwards
    4. the diaphragm becomes dome-shaped.
24. The following are steps involved in the formation of a zygote in plants.
    1. Fusion.
    2. Pollination.
    3. Growth of pollen tube.
    4. Pollen tube breaks.
       The correct order of the steps is
       1. (i), (ii), (iii), (iv)
       2. (ii), (iv), (i), (iii)
       3. (iii), (iv). (i), (ii)
       4. (ii), (iii), (iv), (i).
25. Which of the following components of blood is the largest?
    1. Plasma
    2. Platelets
    3. White blood cells
    4. Red blood cells.
26. The following pairs consist of immunizable diseases except 
    1. tetanus and polio
    2. measles and yellow fever
    3. whooping cough and typhoid
    4. bilharzia and marasmus.
27. The following are ways of controlling water pollution except
    1. controlled use of farm chemicals
    2. applying oil on stagnant water to kill mosquitoes
    3. treating sewage before releasing them into the water
    4. controlling soil erosion.
28.  The diagram below shows a human tooth.
    
    The above tooth is used for
    1. holding
    2. biting
    3. grinding
    4. crushing.
29. The diagram below shows parts of the female reproductive system.
    
    After fertilization, the zygote implants itself at the part marked
    1. R
    2. Q
    3. O
    4. P
30. A sloppy area with shallow channels is likely to be experiencing
    1. splash erosion
    2. sheet erosion
    3. rill erosion
    4. gulley erosion.
31. Which one of the following is not a safety measure when dealing with electricity?
    1. Don't insert iron nails in sockets.
    2. Avoid using electric appliances that are faulty.
    3. Don't shelter under trees on rainy days.
    4. Avoid overloading sockets.
32. The diagram below shows an improvised rain gauge.
    
    The collecting bottle should 
    1. be wide to collect enough water 
    2. be transparent for easy reading 
    3. be placed above the ground
    4. have a funnel sealed to its mouth.
33. The following are characteristics of blackjack except that it
    1. has thorns on its stem
    2. produces white flowers
    3. produces seeds which stick on animals
    4. produces small black dry fruits.
34. Which of the following groups of activities consists of industrial uses of water only?
    1. Boat racing, swimming, fishing. 
    2. Making fountains, cooling machines, cleaning tools.
    3. Washing vehicles, transport, mixing chemicals.
    4. Watering plants, watering animals, irrigation.
35. A person who buys fruits and eats without washing them is likely to contract
    1. bilharzia and malaria
    2. typhoid and cholera
    3. typhoid and malaria
    4. cholera and bilharzia.
36. The following are characteristics of a certain vertebrate.
    1. Varying body temperature.
    2. Scales on the body.
    3. Lay externally fertilized eggs.
       The animal with the above characteristics is likely to be
       1. frog
       2. spiny -ant-eater
       3. tilapia
       4. hen.
37. Farmers apply ash to the compost pit in order to
    1. introduce bacteria
    2. provide food for bacteria
    3. add soil moisture
    4. add soil nutrients.
38. Which one of the following is not an example of a compound fertilizer?
    1. Diammonium Phosphate.
    2. Nitrogen, Phosphorus and Potassium.
    3. Calcium Ammonium Nitrate.
    4. Mono Ammonium Phosphat
    5. The diagram below shows a certain lever in use.
39. Which lever works in the same way as the above lever?
    
    
    1. Staircase
    2. Spade
    3. Claw hammer
    4. Wheelbarrow.
40. The following are effects of drug abuse.
    1. Rape.
    2. Coma.
    3. Addiction.
    4. Truancy.
    5. Drug induced accidents.
       Which pair consists of social effects of drugs abuse?
       1. (iv) and (v)
       2. (iii) and (iv)
       3. (i) and (ii)
       4. (iii) and (ii).
41. Which one of the following plants is a green non-flowering plant?
    1. Moss
    2. Mushroom
    3. Grass
    4. Sunflower.
42. The best way of preventing HIV and AIDS infection among the youth in school is by
    1. testing and counselling
    2. seeking medication
    3. being faithful to their partners
    4. abstinence.
43. The following activities take place during the process of birth in human beings.
    1. Baby comes out.
    2. Contraction of the womb.
    3. Bursting of amniotic sac.
    4. Flow of amniotic fluid.
    5. The cervix dilates.
       Which one of the following lists shows the correct order of the activities?
       1. (i), (ii), (iii), (iv), (v).
       2. (ii), (v), (iii), (iv), (i). 
       3. (iv), (iii), (v), (ii), (i). 
       4. (iii), (iv), (ii), (i), (v).
44. Animals feed on a balanced diet because of the following reasons except to
    1. resist diseases
    2. increase in size and weight
    3. have energy
    4. cure livestock diseases.
45. Which one of the following is an adaptation for both flying and swimming in animals?
    1. Presence of wings.
    2. Strong hind limbs.
    3. Webbed feet.
    4. Streamlined bodies.
46. Which one of the following animal feeds provide a diet of fats and carbohydrates?
    1. Lucerne and clover.
    2. Sunflower and maize grains.
    3. Clover and nappier grass.
    4. Sweet potato vines and desmodium.
47. The importance of fibre in the human diet is to help in the
    1. movement of food
    2. absorption of mineral salts
    3. absorption of nutrients
    4. digestion of food.
48. Which one of the following methods can control both mites and roundworms?
    1. Deworming
    2. Dipping
    3. Rotational grazing
    4. Dosing.
49. Which one of the following small animals are classified in the same" group?
    1. Spider, tick, scorpion.
    2. Beetle, moth, crab.
    3. Centipede, bee, ant.
    4. Tapeworms, snails, slugs.
50. Which one of the following is a stem tuber?
    1. Irish potatoes
    2. Sweet potatoes
    3. Carrots
    4. Cassava.

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