Science Questions - Class 8 Opener Exams Term 2 2023 Set 7

1. Which one of the following is a compound fertilizer?
   1. Double Super Phosphate
   2. Diammonium Phosphate
   3. Calcium Ammonium Nitrate
   4. Urea
2. The following are ways in which water is used for recreation EXCEPT;
   1. sport fishing
   2. surfing
   3. boat rowing
   4. Spraying
3. All the following have oxygenated blood EXCEPT;
   1. pulmonary vein
   2. left auricle
   3. pulmonary artery
   4. aorta
4. Which of the following drugs is the most commonly abused drug in Kenya?
   1. Tobbaco
   2. Bhang
   3. Alcohol
   4. Cigarette
5. Plants that grow on other growing plants are known as
   1. non-green plants
   2. parasitic plants
   3. saprophytic plants
   4. carnivorous plants
6. Which type of soil is referred to as heavy soil?
   1. Clay
   2. Loam
   3. Alluvial soil
   4. Sand
7. The MAIN reason why we sweat is to
   1. remove water
   2. remove salts
   3. cool the body
   4. remove all excretion products
8. Below is a beak of a bird adapted to eat
   
   1. flesh
   2. insects
   3. grains
   4. filters
9. Carnassial teeth are modified
   1. canines
   2. premolars
   3. incisors
   4. molars
10. All environments have
    1. air
    2. soil
    3. plants
    4. water
11. A coin observed at the bottom of a glass of water appears enlarged and raised due to
    1. refraction
    2. reflection
    3. dispersion of light
    4. clear water
12. Which one of the following is a storage pest?
    1. Aphids
    2. White ant
    3. Cutworm
    4. Weaver bird
13. The experiment below was done by Std. 5 pupils.
    
    Which aspect of matter were they investigating?
    1. Air expands on heating
    2. Air conducts heat
    3. Solids conduct heat fastest
    4. Solids expand when heated
14. Which one of the following practices is an advantage to the soil?
    1. Ploughing across the contours
    2. Disposal of vegetables on the garden
    3. Burning of crop remains
    4. Using more fertilizers
15. A child had the following signs and symptoms:-
    1. Loose skin
    2. Passes loose stool
    3. Swollen body parts
    4. Sores at the corner of the mouth
       Which deficiency disease was he suffering from?
       1. Typhoid
       2. Kwashiorkor
       3. Marasmus
       4. Starvation
16. Which of the following is the main reason for breastfeeding? Breast milk
    1. is a balanced diet
    2. is free from germs
    3. easy to digest
    4. provides immunity
17. Which of the following food is preserved using ash?
    1. Beans
    2. Meat
    3. Sugarcane
    4.  Kales
18. The diagram below shows a periscope.
    
    The image is formed at part marked
    
    1. Q
    2. Z
    3. X
    4. Y

Study the diagram below and answer questions 19 and 20

19. Which one of the following processes require absorption of heat from the environment?
    1. W and Z
    2. Y and W
    3. X and Z
    4. X and Y.
20. The temperature at which W takes place is the temperature at which ______ takes place.
    
    1. Z
    2. X
    3. Z and Y
    4. Y
21. The following are effects of HIV infections on an individual. Which one is NOT?
    1. Lack of strength to play
    2. Lowering of self esteem
    3. Low agricultural production
    4. Low standards of living
22. Floating and sinking are affected by the following EXCEPT;
    1. size
    2. shape
    3. Weight
    4. material
23. Digestion of starch starts in the
    1. stomach
    2. small intestine
    3. mouth
    4. gullet
24. Which of the following are water-borne diseases?
    1. Cholera and typhoid
    2. Cholera and anaemia
    3. Typhoid and malaria.
    4. Bilharzia and tuberculosis
25. Heat transfer from the sun reaches us through a process known as
    1. conduction
    2. convection
    3. radiation
    4. diffusion
26. The following are mammals except;
    1. seal
    2. bat
    3. kangaroo
    4. shark
27. Which method of grazing requires electric force?
    1. Tethering
    2. Paddocking
    3. Strip grazing
    4. Zero grazing
28. Which of the following is a beverage crop?
    1. Wheat
    2. Sorghum
    3. Barley
    4. Corn
29. Below is classification of plants. Part Y can be replaced by the following EXCEPT;
    
    
    1. algae
    2. mushroom
    3. moss
    4. lichen
30. Which of the following vitamins help in blood clotting?
    1. Vitamin C
    2. Vitamin K
    3. Vitamin E
    4. Vitamin A
31. Which of the following is NOT immunisable?
    1. Tetanus
    2. Polio
    3. Common cold
    4. Diptheria
32. Exchange of gases take place in the
    1. alveoli
    2. lungs
    3. trachea
    4. nose
33. The following are root tubers EXCEPT;
    1. irish potato
    2. cassava
    3. arrow root
    4. sweet potato
34. Which pin in the diagram below would be the last to fall?
    
    
    1. A
    2. C
    3. D
    4. None
35. The following are functions of some parts of the plant;
    1. Transport water and mineral salts
    2. Transpiration
    3. Store food
    4. Absorption
    5. Support the plant
       Which functions are for roots ONLY?
       1. ii, iv, v
       2. iii, iv, v
       3. i, iii, v
       4. i, ii, iv
36. Force is measured in units called
    1. newton
    2. kilograms
    3. spring balance
    4. gravity
37. When two objects of different masses are dropped
    1. they fall at the same time
    2. the lighter one fall first
    3. they collide
    4. the heavier fall first
38. A drop of blue ink placed in a glass of water gradually mixes with water. This happens because of
    1. diffusion
    2. dissolving
    3. conduction
    4. convection
39. The BEST way to control HIV/AIDS spreading among couples is by
    1. abstainance
    2. being faithful
    3. mutual relationship
    4. using condom
40. One of the following preserves food through dehydration. Which one?
    1. Smoking
    2. Freezing
    3. Salting
    4. Canning
41. The diagram below shows a simple machine.
    
    Which part is the position of fulcrum?
    
    1. X
    2. Y
    3. Z
    4. W
42. The number of waves felt as pulses in arteries are
    1. blood rate
    2. pulse rate
    3. wave rate
    4. heart run
43. Temporary hardness of water is removed by
    1. distillation
    2. boiling
    3. adding soap
    4. filtering
44. Which one of the following is NOT a major plant nutrient?
    1. Nitrogen
    2. Potassium
    3. Sulphur
    4. Phosphorus
45. Heat travels fastest through
    1. gases
    2. solids
    3. liquids
    4. vaccum
46. In the garden pea, a tendril is a modified
    1. stem
    2. root
    3. bud
    4. leaf
47. Which of the following is a strong static electricity?
    1. Car battery
    2. Lightning
    3. Dynamo
    4. Dry cells
48. After fertilization in human beings, a mass of cells is formed. It is called
    1. foetus
    2. embryo
    3. zygote
    4. oviduct
49. Landslides are form of
    1. sheet erosion
    2. gulley erosion
    3. splash erosion
    4. rill erosion
50. The pie chart below shows components of air.
    
    Which two letters represent gases that form approximately 21% of the gas in the atmosphere?
    1. X and Z
    2. W and Y
    3. Z and Y
    4. Z and W