Science Questions and Answers - Class 8 Mid Term Exams Term 1 2023 Set 2

QUESTIONS  

1. Which one of the following minerals works 6. hand in hand with platelets in clotting after an injury?
   
   1. Iron
   2. Calcium
   3. Phosphorus
   4. Vitamin D
2. Which blood vessel carries pure blood rich in oxygen from the lungs to the heart?
   
   1. Pulmonary artery
   2. Pulmonary vein
   3. Aorta
   4. Venacava
3. Which of the following pairs of drugs consists only of illegal drugs in Kenya?
   
   1. Bhang and mandrax
   2. Tobbaco and tea
   3. Coffee and alcohol
   4. Inhalants and miraa
4. Which one of the following stages of HIV/ AIDS infection does one look health with no visible signs but tests positive?
   
   1. Incubation
   2. Window period
   3. Symptomatic
   4. Full blown AIDS
5. Which one of the following is not a function of the placenta?
   
   1. Nourishes the embryo
   2. Produces hormones that maintain pregnancy
   3. Facilitates the transfer of wastes
   4. Lubricates the birth canal during birth
6. Which one of the following sexually transmitted infections has a painless sore on the genitals as one of the signs?
   1. Syphilis
   2. Gonorrhoea
   3. Chancroid
   4. Genital herpes
7. A ruler placed slanting in water appears broken. This is because light
   
   1. from the part of the ruler under the water is reflected
   2. from that part of the ruler under the water is refracted
   3. from that part of the ruler under the water is scattered
   4. travels straight line from a source
8. The diagram below represents a set-up that can be used to demonstrate a certain aspect of heat.
   
   After some time, the wax melted due to;
   
   1. conduction only
   2. convection and conduction
   3. radiation only
   4. conduction and radiation
9. Which one of the following crop pests attacks and destroys crops by drilling holes in stored grains?
   
   1. White ants
   2. Weevil
   3. Stalk borers
   4. Cutworms
10. Which one of the following plants stores food in the same part of the plant as sugarcane?
    
    1. Carrot
    2. sweet potato
    3. Irish potatoes
    4. Cassava
11. A bean seed stores food in the
    
    1. plumule
    2. radicle
    3. testa
    4. cotyledon
12. The following are characteristics of certain animals:
    
    1. body covered with scales
    2. lay eggs
    3. cold blooded
    4. breath through lungs
       Which one of the following pairs of animal has all the characteristics listed?
       
       1. Turtle and shark
       2. Lizard and tortoise
       3. Tilapia and frog
       4. Crocodile
13. Which of the following is the main constituent of a balanced diet obtained by animals when they feed on rice husks?
    
    1. Carbohydrates
    2. Proteins
    3. Vitamins
    4. Mineral salts
14. Which one of the following is not an example of rotational grazing?
    
    1. Strip
    2. Paddocking
    3. Tethering
    4. Zero grazing
15. Which one of the following is the cheapest material for modelling the solar system?
    
    1. Clay
    2. Softboard
    3. Plasticine
    4. Pins
16. The following are some uses of components of air:
    
    1. manufacturing of electric bulbs
    2. supports burning
    3. manufacture of soft drinks
    4. germination of seeds
    5. putting out fire
       Which of the uses are for carbondioxide?
       
       1. i and ii
       2. ii and iv
       3. iii and v
       4. iii and iv
17. A certain lever when in use, can work with load, effort and pivot at different positions as shown in the diagrams below.
    
    Which one of the following levers is described by the diagrams shown above?
    
    1. Wheelbarrow
    2. Spade
    3. Crow bar
    4. Claw hammer
18. Which method of separating mixtures can be used to separate wheat flour from husks?
    1. Picking
    2. Filtering
    3. Sieving
    4. Winnowing
19. In a food chain, which organisms should be the most abundant?
    1. Producers
    2. Tertiary consumers
    3. Primary consumers
    4. Secondary consumers
20. The transfer of heat through solids and gases respectively is
    
    1. conduction and convection
    2. conduction and radiation
    3. conduction and expansion
    4. convection and conductions
21. The diagram below show a set up that was usedto investigate a certain property of matter.
    
    The block of wood floated on water.This is because of its
    1. material
    2. shape
    3. size
    4. weight
22. Materials which allow some light to pass through them but one cannot see them clearly are called
    1. translucent
    2. transparent
    3. opaque
    4. reflectors
23. The largest component of the environment on the surface of earth is
    1. plants
    2. air
    3. water
    4. animals
24. Which water bone disease can be controlled covering pit latrine after use?
    1. Malaria
    2. Bilharzia
    3. Cholera
    4. Typhoid
25. Which type of soil erosion can be prevented  by mulching?
    1. Sheet
    2. Splash
    3. Gulley
    4. Land slide
26. Which one of the following is a natural source of light?
    
    1. Moon
    2. Torch
    3. Electricity
    4. Firefly
27. Which one of the following is true about friction. Friction can be
    
    1. Increased by streamlining
    2. reduced by treading
    3. used to make work easier
    4. measured using a spring balance
28. Which one of the following food stuffs constitutes a balanced diet?
    
    1. Potatoes, beans, eggs
    2. Chicken, cabbage, beans
    3. Rice, chapati, beans
    4. Peas, ugali, spinach
29. The diagram below represents a windvane constructed by pupils
    
    A suitable material can be used to make the part labelled Q is
    1. sheet of metal
    2. piece of mosquito net
    3. polythene sheet
    4. sheet of paper
30. In which one of the following circuit diagrams will the bulb light?
    
31. Which one of the following is not a way of  using water sparingly?
    1. Reusing domestic water for irrigation
    2. Use of drip irrigation
    3. Closing taps that are not in use
    4. Repairing leaking pipes 
32. Which one of the following food stuffs contain mainly fats?
    
    1. Milk
    2. Beans
    3. Peas.
    4. Bananas.
33. The following are characteristics of certain types of clouds
    
    1. white in colour
    2. appear like bundles of cotton
    3. dark grey in colour
    4. mountainous in shape
       Which pair of features are for cumulus clouds?
       1. (i), (ii)
       2. (ii), (iv)
       3. (i) and (iii)
       4. (ii) and (iii)
34. The diagram below represents a set-up that canbe used to demonstrate a certain process involved in change of states of matter.
    
    The process that takes place at point labelled X is
    1. boiling
    2. Condensation
    3. Evaporation
    4. Freezing
35. Which one of the following activities can be used to demonstrate sheet erosion pouring water?
    1. Different positions on a slanting surface
    2. In channels of soil on slanting surface
    3. On a flat surface soil
    4. On a flat surface using a tin with many holes
36. Which one of the following pairs consists only of materials that are non-magnetic?
    1. Copper and aluminium
    2. Steel and zinc
    3. Silver and steel
    4. Iron and aluminium
37. Which one of the following activities will make a bottle top that was floating to sink in water?
    1. Increasing the amount of water
    2. Raising the container with water
    3. Changing the water into another container
    4. Crushing the bottle top
38. Which one of the following ways of improving soil fertility will take the longest time for plants to get nutrients using?
    1. Compost manure
    2. Compound fertilizer
    3. Farmyard manure
    4. Green manure
39. Which type of soil easily drains water?
    1. Sand
    2. Loam
    3. Clay
    4. Loam and sand
40. Which one of the following is not a practice for maintaining simple tools?
    1. Oiling
    2. Using for the right purpose
    3. Sharpening
    4. Storing in a safe place
41. Newton is a unit for measuring?
    1. Mass
    2. Force
    3. Pressure
    4. Volume
42. Which one of the following consists only of sexually transmitted infections?
    1. Bilharzia and cholera
    2. Anaemia and malaria
    3. Syphilis and typhoid
    4. Gonorrhoea and syphilis
43. Which one of the following is not a feature of plants that grow in wet areas?
    1. Feathery roots
    2. Floating flowers
    3. Deep roots
    4. Air sacs
44. Which one of the following is not a characteristic of carnivores?
    1. Well spaced teeth
    2. Long and sharp canines
    3. Presence of carnassial teeth
    4. Presence of a diastema
45. Corrugated iron sheets can be damaged when they come into contact with
    1. oil spills
    2. herbicides
    3. industrial gases
    4. dust
46. Which one of the following is a modern method of food preservation?
    1. Salting
    2. Smoking
    3. Use of honey
    4. Canning
47. Which one of the following groups consists of only cash crops?
    1. Maize, tea, yams
    2. Coffee, tea, cocoa
    3. Banana, orange, carrot
    4. Coconut, maize, beans
48. The purpose of using rollers to move a load is to
    1. increase the force required to push the load
    2. reduce force that hinders movement of the load
    3. make the load lighter
    4. control the direction of the movement of the load
49. The following are activities followed when making a simple beam balance but not in the correct order
    1. fix the stand to the base
    2. suspend the arm to find the balancing point
    3. make the arm, stand and base
    4. suspend the tins using strings
    5. fix the arm to the stand
       Which one of the following is the correct order of activities?
       1. (iii), (ii), (i), (v), (iv)
       2. (iii), (ii), (v), (iv), (i)
       3. (iii), (ii), (i), (iv), (v)
       4. (iii), (v), (ii), (i), (iv)
50. The chart below represents a simple classification of liquids.
    
    Which liquids are represented by S and Q?
    1. Methlylated spirit,  Water
    2. Engine oil,  Methylated spirit
    3. Cooking oil,  Water
    4. Turpentine,   Engine oil

MARKING SCHEME

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