Science Questions and Answers - Class 8 Mid Term 3 Exams 2023 Set 1

1. Which one of the following parts of the human body produces sweat?
   1. Sweat duct
   2. Sweat pore
   3. Epidermis
   4. Sweat glands.
2. The diagram below represents the reproductive system.
                                                                    
   The development of the embryo
   to a foetus takes place in the part labelled
   1. L
   2. M
   3. N
   4. K
3. Which one of the following physical changes that take place during adolescence happens only in girls?
   1. Increase in height and weight.
   2. Enlargement of hips.
   3. Widening of the chest.
   4. Production of sex cells.
4. Which one of the following pair of diseases consist of only immunisable diseases?
   1. Typhoid and marasmus.
   2. Malaria and tuberculosis.
   3. Hepatitis B and diptheria
   4. Whooping cough and anacmia.
5. The following are effects of drug abuse:
   (i) Rape.
   (ii) Addiction.
   (iii) Lack of concentration.
   (iv) Truancy
   (v) Impaired judgement.
   Which one of the following consists only of social effects?
   1. (ii) and (iii)
   2. (iv) and (v)
   3. (v) and (iii)
   4. (i) and (iv)
6. Which of the following planets is between Jupiter and Uranus?
   1. Mars
   2. Neptune
   3. Saturn
   4. Venus
7. The main reason of using clay lining in an improved jiko is to
   1. make it more efficient.
   2. prevent wastage of time.
   3. prevent heat loss through radiation.
   4. make it more durable.,
8. Which one of the following plants is mainly grown to provide threads?
   1. Sugarcane
   2. Mango
   3. Cotton
   4. Sunflower
9. Which of the following combination consists of only useful fungi?
   1. Penicillium and dandruff
   2. Mushroom and puffball
   3. Yeast and penicillum
   4. Toadstool and moulds
10. Which of the following parts of a herbivore help them to properly chew food?
    1. Carnassial teeth
    2. Diastema
    3. Long tongue
    4. Horny pad
11. The percentage of the component of air that is useful in leguminous plants is
    1. 0.03%
    2. 78%
    3. 0.97%
    4. 21%
12. Which one of the following is true about soil that has best capillarity?
    1. Best for modelling.
    2. Best in construction.
    3. Suitable for growing crops.
    4. It has large particles.
13. The temperature at which a substance melts is the same temperature at which the substance
    1. contracts
    2. evaporates
    3. freezes
    4. condenses
14. Which one of the following sources of energy contain only chemical energy?
    1. Biogas and dynamo.
    2. Geothermal and dry cells.
    3. Car battery and solar panels.
    4. Food and charcoal.
15. The diagram below represents a simple electromagnet.
                                                                           
    Which of the following energy transformations occur in the electromagnet.
    1. Electrical → magnetic → heat
    2. Chemical → electrical → magnetic
    3. Chemical → magnetic →heat.
    4. Electrical → chemical → magnetic
16. Which of the following groups of food would provide nutrients suitable for a child suffering from anaemia?
    1. Spinach, liver, broccoli
    2. Fish, pork, beans.
    3. Rice, bacon, apple.
    4. Redmeat, groundnuts, millet.
17. During an activity, pupils had the following liquids in different containers?
    Container A - Milk.
    Container B - Kerosene
    Container C - Water
    Container D - Cooking oil
    They mixed the liquids in containers A, C and D in one container. How many layers were they able to observe?
    1. 1 layer
    2. 3 layers
    3. 4 layers
    4. 2 layers.
18. Which one of the following statements is not correct-about reproduction in human beings?
    1. Menstrution stops during pregnancy.
    2. The zygote gets implanted in the wall of the uterus
    3. The blood of the mother and foetus do not mix.
    4. Fertilization takes place in the uterus.
19. Which of the following statement is true about aorta? It carries
    1. deoxygenated blood.
    2. blood to the heart.
    3. blood at low pressure.
    4. blood at a high pressure.
20. Spring balance is used in measuring
    1. force
    2. mass
    3. length
    4. temperature
21. Which one of the following is an effect of soil pollution on living things?
    1. Affect soil composition.
    2. Cause death of small animals.
    3. Affect air circulation in the soil.
    4. Lower soil fertility.
22. In which one of the following activities is renewable energy in use?
    1. Using a thermos flask to keep hot liquids.
    2. Cycling for short distance.
    3. Production of electricity using a solar panel.
    4. Using cars with less fuel consumption.
23. Which of the following is an effect of HIV and AIDS to the family?
    1. Low standards of living.
    2. Congestion in hospitals.
    3. Low agricultural production.
    4. Increased number of school dropouts.
24. The following materials can be used to construct a certain weather instrument.
    (i) Water and ink.
    (ii) A basin.
    (iii) Manilla paper.
    (iv) A glass bottle.
    (v) Straw and cork.
    (vi) A wooden stand..
    The weather instrument likely to be constructed is
    1. a windsock
    2. an air thermometer
    3. a windvane
    4. a liquid thermometer.
25. Which of the following drugs is correctly classified?
    

    	Illegal	Legal
    A.	Alcohol	Bhang
    B.	Mandrax	Heroin
    C.	Tobacco	Alcohol
    D.	Cocaine	Khat

26. The diagram below represents a set up that can be used to demonstrate a certain aspect of heat energy.
                                                                          
    The aspect that can be demonstrated is
    1. convection in gases.
    2. expansion in liquids.
    3. contraction in liquids.
    4. expansion in gases.
27. Which one of the following is an advantage of using fertilizer in the farm?
    1. They are bulky to transport.
    2. Have long term effect.
    3. Provide soil with specific nutrient.
    4. Improve ability of the soil to hold water.
28. Which one of the following components of blood is involved in transportation of heat and digested food?
    1. Plasma
    2. White blood cells.
    3. Platelets.
    4. Red blood cells.
29. Which one of the following crop pests mainly attack young seedlings in the seedbed?
    1. Stalkborer
    2. Aphids
    3. Cut worm
    4. Weevils
30. Which of the following is a common characteristic between a crocodile and a platypus? They
    1. have scales.
    2. lay fertilized eggs.
    3. have varying body temperatures.
    4. have external fertilization.
31. Which is the last step in modelling a solar system?
    1. Putting the name tags.
    2. Pasting manilla paper.
    3. Mounting the planets.
    4. Drawing orbits.
32. In which one of the following is work made easier by increasing the effort distance?
    1. Flag post
    2. Claw hammer
    3. Wheelbarrow
    4. Staircase
33. Which one of the following mixtures cannot be separated by use of a magnet?
    1. Staples and maize flour.
    2. Sawdust and office pins.
    3. Steelwool and iron filings.
    4. Razor blades and aluminium foils.
34. Which one of the following does not pollute water?
    1. Soil erosion.
    2. Oil spillage.
    3. Acid rain.
    4. Human waste.
35. Which of the following is an adaptation of fish to swimming?
    1. Hollow bones.
    2. Scales pointing backwards.
    3. Webbed feet.
    4. Presence of gills.
36. Which one of the following practices will help to prevent the spread of Bilharzia?
    1. Boiling water before drinking.
    2. Wearing gumboots when walking in stagnant water. 
    3. Draining stagnant water from around the homestead.
    4. Covering latrines after use.
37. Which one of the following soil components is least affected when soil in a container is heated?
    1. Air
    2. Organic matter
    3. Mineral particles
    4. Water
38. Which one of the following processes involve absorption of heat from the surrounding?
    1. Melting and evaporation.
    2. Condensation and evaporation.
    3. Melting and freezing.
    4. Condensation and freezing.
39. The diagram below represents a set up that can be used to demonstrate a certain property of air.
                                                                  
    Which observation was not likely to be observed during the experiment?
    1. Water rose in the glass jar.
    2. Water rose in the basin.
    3. Carbon dioxide increased in the glass jar.
    4. Candle went off after sometime.
40. Which of the following methods of preserving food is both modern and traditional?
    1. Smoking.
    2. Salting.
    3. Drying.
    4. Refrigeration.
41. Which one of the following. methods of soil conservation can be used to control splash erosion?
    1. Planting cover crops. 
    2. Practising contour farming.
    3. Building gabions.
    4. Making terraces.
42. A card with the word BLOCK written on it was placed in front of a mirror. Which one of the following shows how the word would appear in the mirror? 
    
43. Inorder to replace blood lost during birth, a lactating mother should cat food rich in
    1. iron
    2. phosphorous
    3. vitamin D
    4. calcium
44. Which of the following factors make a plastic bowl to float in water?
    1. Shape
    2. Size
    3. Material.
    4. Mass
45. The following are some adaptations of plants that grow in dry environment except having
    1. thick cuticle..
    2. broad leaves.
    3. deep roots.
    4. needlike leaves.
46. Which one of the following is a use of translucent materials?
    Making
    1. bathroom window panes.
    2. car windscreens.
    3. mirrors.
    4. toilet walls.
47. Which of the following is not an electrical appliance used at home?
    1. Radio
    2. Immersion heater
    3. Gas cooker
    4. Iron box
48. The following are activities carried out when making a simple beam balance:
    (i) Fix the stand and arm to the base.
    (ii) Suspend plank of wood to find the balancing point.
    (iii) Make a base for the balance.
    (iv) Fix the nails on both sides of the plank of wood.
    (v) Suspend tins on arms.
    Which one of the following is the correct order in which the activities are carried out? 
    1. (iii), (i), (ii), (iv), (v)
    2. (ii), (iii), (i), (iv), (v)
    3. (v), (iv), (ii), (i), (iii)
    4. (i), (iii), (ii), (v), (iv)
49. Which one of the following should be done inorder to move a stationary heavy load?
    1. Make the surface rough.
    2. Use less force.
    3. Apply greater force.
    4. Use equal force.
50. Heat reaches the fect of a person seated by the side of a fire by
    1. convection and raation.
    2. convection only.
    3. conduction and radiation.
    4. radiation only.

  MARKING SCHEME

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