Science Questions and Answers - Class 8 Opener Exams Term 2 2023 Set 4

QUESTIONS

1. Which one of the following takes place during exhalation?
   1. Lungs inflate
   2. Diaphragm forms dome shape 
   3. Ribs move outwards
   4. Chest volume increases
2. Which one of the following blood vessels is connected to the right ventricle?
   1. Pulmonary vein
   2. Aorta
   3. Vena cava
   4. Pulmonary artery
3. The diagram below shows a female reproductive organ. 
   
   Conception occurs in the part marked
   1. D
   2. C
   3. B
   4. A
4. The following are effects of abusing drugs.
   1. Truancy
   2. Marital conflicts
   3. Impaired judgment
   4. Lack of concentration
   5. Drug induced accidents
      Which set consists of social effects only?
      1. (i) (iii) (v)
      2. (i) (ii) (iv)
      3. (ii) (iv) (v)
      4. (i) (ii) (v)
5. A child was taken to the hospital at 6 weeks for vaccination. Which vaccine was the child not administered to?
   1. Anti-polio vaccine
   2. Anti-measles
   3. Diphtheria
   4. Whooping cough
6. Which one of the following pairs of plants are green, non-flowering?
   1. Moss and toadstool 
   2. Fern and mushroom
   3. Algae and liverworts 
   4. Mould and fern
7. Which of the following cannot be classified with weevils?
   1. Termites
   2. Moths
   3. Mites
   4. Crickets
8. The diagram below shows a feeding relationship in a certain habitat.
   GRASS-ANTELOPES - LIONS - VULTURES
   Which one of the following will not happen if all the antelopes are killed?
   1. Grass will increase 
   2. Vultures will increase 
   3. Grass will decrease
   4. Lions will decrease
9. The following are characteristics of a certain weed:
   1. Purple flowers
   2. Yellow fruits which are ripe
   3. Thorns on the stems and leaves
      The above weed is likely to be
      1. Sodom apple 
      2. Thorn apple
      3. Wandering jew
      4. Mexican marigold
10. Which one of the following crop pests affect the crops by making holes in stored grains?
    1. Weevils
    2. Stalk borers
    3. Weaverbirds
    4. Moles
11. The diagram below shows a germinating bean seed.
    
    Which part of the seed represents the seed leaf?
    1. P
    2. Q
    3. S
    4. R
12. Which animal below moves by both flying and hopping?
    1. Cockroach
    2. Cricket
    3. Mite
    4. Flea
13. The diagram below shows the beak of a bird.
    
    The above beak belongs to a
    1. nectar feeder
    2. grain feeder
    3. filter feeder
    4. bird of prey
14. The use of laundry water to wash the toilets conserves water by
    1. Using water sparingly
    2. Harvesting
    3. Re-using
    4. Re-cycling
15. Which one of the following is the main water pollutant?
    1. Raw sewage
    2. Soil particles
    3. Acid rain
    4. Industrial wastes
16. Which one of the following signs is common to cholera, bilharzia and typhoid?
    1. Diarrhea
    2. Vomiting
    3. Skin rashes
    4. Blood-stained stool
17. The rate at which water drains in the soil is mainly determined by
    1. volume of soil
    2. size of the soil particles
    3. humus content in the soil
    4. air content in the soil
18. Which type of soil erosion takes place without being noticed?
    1. Sheet erosion
    2. Splash erosion
    3. Gulley erosion
    4. Rill erosion
19. Which one of the following is not a characteristic of cumulus clouds?
    1. They have regular shape 
    2. They cover the whole sky 
    3. They indicate fine weather
    4. They are found at high altitudes
20. A rocket was launched from planet Mars to Uranus. It passed through?
    1. Jupiter and Saturn
    2. Jupiter and Uranus
    3. Earth and Saturn
    4. Uranus and Neptune
21. Which of the following non-green plants is used in the confectionery industry?
    1. Mould
    2. Yeast
    3. Penicillium
    4. Fungi
22. The following are signs and symptoms of food poisoning except
    1. dizziness
    2. headache
    3. vomiting
    4. fever
23. Which one of the following vitamins is useful in healing wounds, healthy teeth, gums and skin?
    1. Vitamin E
    2. Vitamin C
    3. Vitamin D
    4. Vitamin K
24. The following methods preserve food by dehydrating except
    1. Salting
    2. Sun drying
    3. Canning
    4. Smoking
25. The pie chart below represents air composition.
    
    Which part represents the gas that varies from time to time?
    1. T 
    2. S
    3. Q
    4. R
26. When rays of light pass from air to water they
    1. bounce back
    2. increase in size
    3. are bent
    4. are absorbed
27. Heat transfer where no medium is required is known as
    1. Convection
    2. Radiation
    3. Conduction
    4. Reflection
28. Insoluble solids can be separated from liquids by
    1. evaporation
    2. decantation
    3. dissolving
    4. filtration
29. Which method of grazing is drawn below?
     
    1. Stall feeding
    2. Tethering
    3. Strip grazing
    4. Paddocking
30. A spade can be classified in the same class of levers as
    1. fishing rod
    2. scissors
    3. claw hammer
    4. wheelbarrow
31. Which one of the following is not a condition necessary for a bean seed to germinate?
    1. Sunlight
    2. Moisture
    3. Oxygen
    4. Favourable temperature
32. A patient had the following signs and symptoms:
    1. Grey-yellowish discharge
    2. Burning sensation while urinating
    3. Pus
       The patient was very likely to have
       1. gonorrhea
       2. syphilis
       3. chancroid
       4. genital herpes
33. A meal of Irish potatoes, beans and rice should be made a balanced diet by
    1. removing one carbohydrate
    2. adding water
    3. adding protein
    4. adding vitamin
34. Termites breathe through their
    1. nostrils
    2. pores
    3. spiracles
    4. antennae
35. The ability to do work is
    1. energy
    2. fever
    3. effort
    4. motion
36. The amount of matter in a substance determines its
    1. weight 
    2. density
    3. mass 
    4. size
37. The following are examples of water pollutants except
    1. oil spillage
    2. farm chemicals
    3. soil particles
    4. exhaust fumes
38. Which one of the following is not an effect of HIV/AIDS to an individual?
    1. Low self esteem
    2. Low living standards
    3. Children become orphans
    4. Person feels ashamed
39. Which one is not a physical change boys experience during puberty?
    1. Menstrual flow
    2. Wet dreams
    3. Wide shoulders
    4. Growth of beards
40. What should be done to the remaining medicines after the completion of the prescribed dose?
    1. Keep for future use
    2. Dispose the excess medicine
    3. Complete the remaining medicine 
    4. Share it with a person with a similar infection
41. Which part of a flower is not a carpel?
    1. Style
    2. Stamen
    3. Ovary
    4. Stigma
42. Which one of the following is not a straight fertilizer?
    1. Diammonium Phosphate
    2. Triple Superphosphate
    3. Calcium Ammonium Nitrate
    4. Muriate of Potash
43. The following are signs of ill-health in crops except
    1. withering
    2. retarded growth
    3. folded leaves
    4. robust growth
44. In a windvane, the arrow head should be
    1. larger than the tail 
    2. heavier than the arm 
    3. made of a cardboard 
    4. smaller than the tail
45. Which one of the following animals can't be classified together with turtles?
    1. Newts
    2. Crocodiles
    3. Lizards
    4. Snakes
46. The following are good practices for a healthy teeth. Which on is not?
    1. Eating sugercane
    2. Eating soft snacks
    3. Visiting a dentist regularly
    4. Brushing teeth regularly
47. The set up below was carried out by Std. 8 pupils of Uloma Kodero school.
    
    Which component of soil were they investigating?
    1. Living organisms
    2. Moisture
    3. Soil particles
    4. Air
48. Which one of the following is not a use of water in industries?
    1. Making pulps 
    2. Making surfings 
    3. Washing berries
    4. Cooling machines
49. An improved jiko conserves heat energy by
    1. conduction
    2. burning
    3. radiation
    4. insulation
50. The diagram below shows a treaded car tyre.
    
    The main reason for treading is to
    1. make the tyre look attractive 
    2. increase friction
    3. reduce friction
    4. increase durability

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