Science Questions and Answers - Class 8 Mid Term Exams Term 1 2023 Set 12

QUESTIONS  

1. The diagram below shows parts of a bean seed.
   
   Which letter represents the part that stores food for the embryo plant?
   
   1. T
   2. S
   3. Q
   4. T
2. All the following livestock parasites attack small intestines except
   
   1. liverflukes
   2. tapeworms
   3. roundworms
   4. hookworms.
3. The chart below shows classification of plants.
   
   Which plants were not correctly classified?
   
   1. Sisal and mushroom
   2. Moss and mushroom
   3. Sisal and onions
   4. Moss and onions
4. The following are descriptions of stages of HIV infection.
   
   1. the patient can spread the virus
   2. no visible signs and symptoms
   3. the patient has AIDS
   4. the patient looks healthy and strong
      Which ones describe the third stage of HIV infection?
      
      1. i, iv
      2. ii, iii, iv
      3. i, ii, iii
      4. i, iii
5. Which one of the following is not a sexually transmitted infection?
   
   1. Syphillis
   2. Gonorhoea
   3. Rota virus
   4. Chancroid
6. All the following are illegal drugs in Kenya except
   
   1. inhalants
   2. khat
   3. bhang
   4. cocaine.
7. Which of the following can be least used as a fodder crop?
   
   1. Star grass
   2. Napier grass
   3. Maize stalk
   4. Sweet potato vines
8. The chart below shows a simple food chain.
   Grain→ Hen→ Mongoose → Eagle
   Which organism represents the primary consumer?
   
   1. Mongoose
   2. Eagle
   3. Grass
   4. Hen
9. The following are characteristics of vertebrates.
   
   1. Body covered with dry scales
   2. Breathe through lungs 
   3. Cold-blooded
   4. Lay fertilized eggs
   5. Has moist skin
      Which ones are common characteristics in both a toad and a gecko?
      
      1. ii, ii, iii
      2. ii, iii, iv
      3. ii and iii
      4. iii and iv
10. The diagram below shows parts of the male reproductive system.
    
    Male sex cells are produced in the part marked
    
    1. T
    2. S
    3. Q
    4. R.
11. The following are stages of foetal development.
    
    1. The amnion sac breaks
    2. Umblical cord is tied and cut
    3. The baby comes out
    4. Amniotic fluid is released
    5. Walls of the uterus contracts 
    6. Removal of the afterbirth
       Which one of the following shows the correct order?
       
       1. v, i, iv, iii, ii, vi
       2. i, iv, v, iii, ii, vi
       3. v, i, iv, iii, vi, ii
       4. i, iv, v, iii, vi, ii
12. A boy inhaled a poisonous gas. Which chamber of the heart received the poisonous blood first?
    
    1. Right auricle
    2. Left auricle
    3. Left ventricle
    4. Right ventricle
13. Which statement below is not true about fertilizers?
    
    1. They scorch the plant if used in large amount.
    2. Their use leads to good produce. 
    3. Their long term use may damage the soil.
    4. They are bulky and difficult to transport.
14. Some pupils carried out the experiment shown below.
    
    Name the types of soil marked W, X and Y respectively.
    
    1. Loam, clay, sand
    2. Sand, clay, loam
    3. Loam, sand, clay
    4. Clay, loam, sand
15. Which of the following weather instruments measures two aspects of weather?
    
    1. Windvane
    2. Windsock
    3. Rain guage
    4. Liquid thermometer
16. Some pupils wanted to investigate the formation of a rainbow. They most likely collected all the following materials except
    
    1. torch
    2. water
    3. mirror
    4. basin.
17. Which one of the following is not a magnetic material?
    
    1. Iron
    2. Steel
    3. Tin
    4. Copper
18. Which one of the following activities is used to show that pressure in liquids is equal at the same depth?
    
19. All the following are functions of the smallest component of air except
    
    1. making plant food
    2. necessary for seed germination.
    3. preserving soft drinks
    4. extinguishing fire.
20. Which one of the following is not a safety precaution against electricity?
    1. Do not switch on lights with bare hands
    2. Do not overload sockets
    3. Do not climb on power poles
    4. Do not stick objects in electrical outlets
21. The diagram below shows a method of heat transfer.
    
    Which method of heat transfer reached the point marked Q?
    
    1. Radiation
    2. Conduction
    3. Radiation and convection
    4. Convection
22. Which one of the following is not an importance of water in a diet? Water
    1. helps in absorption of food
    2. prevents constipation
    3. helps in the removal of waste 
    4. forms part of blood.
23. Which one of the following is not an energy-giving food?
    
    1. Coconut
    2. Ripe banana
    3. Rice
    4. Peas
24. Which of the following parts of the breathing system clean the air that is breathed in?
    
    1. Lungs and nose
    2. Bronchus and tracheas
    3. Nose and trachea
    4. Diaphragm and lungs
25. Which one of the following is not a true description of canines?
    
    1. They are sharp pointed
    2. They are used for tearing
    3. They are eight in the month
    4. They grow next to incisors
26. Which one of the following is not an effect of HIV/AIDS to the nation?
    
    1. Lack of parental care
    2. Increased medical expenses
    3. School drop outs
    4. Low productivity in farming
27. A patient was suffering from tuberculosis. He can best prevent the spread of the disease by
    
    1. getting vaccinated
    2. being isolated and treated immediately
    3. observing high standard of hygiene
    4. living in a well ventilated room.
28. Which type of weed is shown in the diagram below?
    
    1. Oxalis
    2. Sodom apple
    3. Black jack
    4. Pigweed 
29. Which one of the following is not a tuber crop?
    
    1. Cassava
    2. Onions
    3. Yams
    4. Carrot
30. Which type of grazing requires a small piece of land?
    
    1. Herding
    2. Tethering
    3. Stall feeding
    4. Strip grazing
31. All the following are signs andsymptoms of typhoid except
    
    1. muscular pain
    2. loss of appetite
    3. rashes develop on the skin
    4. itching at the bowel.
32. Which one of the following activities is not likely to pollute water?
    
    1. Constructing gabion along water ways
    2. Urinating in water sources
    3. Discharging raw sewage into sources of water
    4. Cows drinking directly from the river
33. Some pupils carried out the experiment shown below.
    
    Which component of soil were they investigating?
    
    1. Mineral particles
    2. Organic matter
    3. Living organism
    4. Water
34. Which material below is not needed when making a simple model of the solar system?
    
    1. Plasticine
    2. Cotton wool
    3. Thorn
    4. Softboard
35. Which one of the following instruments is used to measure a pull or a push applied on an object?
    
    1. Weighing scale
    2. See-saw
    3. Spring balance
    4. Beam balance
36. Which simple lever below has the position of effort between the load and the fulcrum?
    
    1. Spade
    2. Claw-hammer
    3. Wheelbarrow
    4. Crow-bar
37. All the following materials are needed when constructing a simple beam balance except
    
    1. timber
    2. thread
    3. nails
    4. scale.
38. Which one of the following is not a characteristic of wind-pollinated flowers?
    
    1. They produce large amount of pollen grains
    2. They have hairy stigma.
    3. They have long style
    4. They are large in size.
39. All the following invertebrates belong to the same group except
    
    1. spider
    2. tick
    3. scorpion
    4. flea.
40. Which one of the following is a common method of controlling both internal and external livestock parasites?
    
    1. Deworming
    2. Practising rotational grazing
    3. Spraying
    4. Dipping
41. All the following are reasons for lighting a house except to
    
    1. see clearly
    2. discourage pests
    3. provide warmth
    4. avoid accidents.
42. Which one of the following is not a special sound?
    
    1. Shouting
    2. Screaming
    3. Ambulance siren
    4. A car hooting
43. The experiment drawn below was carried out to investigate a certain property of light.
    
    From the above activity, they concluded that
    
    1. light travels in all directions
    2. light travels in a straight line
    3. light can be reflected
    4. light can bend.
44. All the following belong to the same state of matter except
    
    1. cooking fat
    2. ice
    3. glass
    4. water.
45. A boy accidentally mixed maize and millet. Which one of the following is the best method of separating the above mixture?
    
    1. Picking
    2. Winnowing
    3. Sieving
    4. Filtering
46. Which one of the following is not true about friction force?
    
    1. Walking becomes easy when there is no friction
    2. It causes tear and wear
    3. It makes work difficult
    4. It can be reduced by reducing the area of contact
47. The diagram below shows parts of the urinary system.
    
    Urine is produced in the part marked
    
    1. F
    2. E
    3. G
    4. H.
48. The following are signs and symptoms of a certain sexually transmitted infection.
    
    1. Pain when passing out urine 
    2. Yellowish discharge
    3. Can cause blindness to the newborns
       The above disease is most likely to be
       1. syphilis
       2. chancroid
       3. tuberculosis
       4. gonorrhoea.
49. Which one of the following can be seen in the sky both during the day and night?
    1. Stars and moon
    2. Clouds and stars
    3. The moon and clouds
    4. The sun and the moon
50. Some pupils carried out the experiment shown below.
    
    From the above activity, they concluded that
    
    1. gases expand when heated 
    2. balloons expand when heated
    3. convection occurs in liquids
    4. liquids change state when heated.

MARKING SCHEME

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