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

QUESTIONS

1. Which one of the following shows the correct order of foetal development immediately ater fertilization in human beings?
   1. Embryo-Zygote - Foetus
   2. Zygote Embryo - Foetus
   3. Embryo-Foetus-Zygote
   4. Zygote Foetus-Embryo
2. Which one of the following is NOT an effect of air pollution?
   1. Formation of acid rain
   2. Causes respiratory diseases
   3. Interferes with photosynthesis
   4. Death of small animals
3. The diagram below shows a flower.
   
   Which two parts make up the stamen?
   1. M,N
   2. N, K
   3. M, L
   4. K, L
4. Loo, a std. eight pupil, mixed fresh milk, water and kerosene during an experiment on mixing liquids. Which one of the following observations did he make?
   1. Only two layers were formed
   2. Only fresh milk mixed with kerosens
   3. The mixture formed three layers
   4. Only water and kerosene mixed
5. Which one of the following pairs of planets consists of a planet that takes the longest time and a planet that takes the shortest time to go round the sun?
   1. Jupiter and Mars
   2. Neptune and Mercury
   3. Earth and Saturn
   4. Venus and Neptune
6. The diagram below shows an improvised weather instrument
   
   Which one of the following does NOT affect the accuracy of the above instrument?
   1. The diameter of the funnel
   2. The diameter of the collecting jar
   3. The distance between the markings on the collecting jar
   4. The material used to make the container
7. Which one of the following would help to conserve the environment?
   1. Using wood ash to kill pests
   2. Burning heaps of saw dust
   3. Burying plastics in the soil
   4. Using commercial fertilizers to increase crop yields
8. Which two components make about 78% of the volume of air?
   1. Oxygen and carbon dioxide
   2. Nitrogen and oxygen
   3. Carbon dioxide and nitrogen
   4. Rare gases and nitrogen
9. Which one of the following pairs of energy can be transmitted only when there is a medium?
   1. Heat and light
   2. Sound and light
   3. Sound and electricity
   4. Heat and electricity
10. The diagram below represents a person pushing a heavy log of wood along a flat surface
    
    Which one of the following changes would make the person push the log more easily?
    1. Smearing oil on the flat surface
    2. Wearing shoes with rough soles
    3. Smearing oil on the log of wood
    4. Pouring murram on the flat surface
11. The diagram below shows an electric circuit
    
    Which material when used to close the gap marked Q will make the bulb light?
    1. Plastic ruler
    2. A piece of thread
    3. A copper rod
    4. A rubber band
12. The following are functions of stems:
    1. Support the shoot
    2. Storage of food
    3. Transport water to the leaves
    4. Manufacture food for the plant
       Which functions are performed by all stems?
       1. (i) and (iii)
       2. (iii) and (iv)
       3. (i) and (ii)
       4. (ii) and (iv)
13. Which one of the following is formed first after fertilization?
    1. Foetus
    2. Embryo
    3. Zygote
    4. Ovum
14. The table below shows parts of the human digestive system and their functions.
    

    Part	Function
    Small intestine	Absorption of food
    Stomach	Y
    X	Absorption of water

    Which of the following options represents X and Y?
                    X                                Y
    1. Oesophagus             Passage of food
    2. Large intestine         Digestion of food
    3. Mouth                       Taking in food
    4. Trachea                    Passage of food
15. Which one of the following practices helps to conserve soil by preventing soil erosion?
    1. Crop rotation
    2. Use of manure
    3. Mulching
    4. Planting cover crops
16. The table below shows observations made when three soil samples Q, R and S were mixed with water and then rolled out to make ribbons.
    

    Soil sample	Characteristics
    Q	Held its shape
    R	Cracked
    S	Could not be rolled

    Which one of the soil samples has the lowest capillarity?
    1. S
    2. R
    3. Q
    4. S and R
17. Which one of the following statements correctly describes cross-pollination?
    1. The transfer of pollen grains from the anther to the stigma of the same flower
    2. The transfer of pollen grains from the anther to the stigma of different flowers on plants of different kinds
    3. The transfer of pollen grains from the anther to the stigma of another flower on the same plant
    4. The transfer of pollen grains from the anther to the stigma of different flowers on plants of the same kind
18. Which one of the following effects of drug abuse consists of social effects?
    1. Theft and lack of concentration
    2. Rape and withdrawal sysmptoms
    3. Drug induced accidents and truancy
    4. Drug addiction and loss of concentration
19. In the diagram below shows interdependence in plants.
    
    The diagram shows that plants depend on others for
    1. support 
    2. shade
    3. nutrients
    4. habitat
20. Which one of the following is NOT important to consider when taking medicine?
    1. The dose
    2. The date of manufacture
    3. Duration to complete the dose
    4. How to store the medicine
21. Which one of the following statements about blood circulation is TRUE?
    1. Aorta receives oxygenated blood from the left auricle
    2. Oxygenated blood from the lungs is received by the aorta
    3. Pulmonary vein takes oxygenated blood to the lungs
    4. Pulmonary artery receives deoxygenated blood from the right ventricle
22. Which one of the following groups consists of materials which are all magnetic?
    1. Aluminium, brass, copper
    2. Iron, steel, cobalt
    3. Iron, copper, cobalt
    4. Steel, brass, aluminium
23. Which one of the following mixtures cannot be separated by either dissolving, filtering and evaporating or by using a magnet?
    1. Iron fillings and maize flour
    2. Salt and sugar
    3. Salt and sand
    4. Iron fillings and sand
24. Which one of the following is a part of the embryo of a seed?
    1. Micropyle
    2. Endosperm
    3. Radicle
    4. Cotyledon
25. Which one of the following shows the CORRECT order of the processes that take place when ice is heated until steam is formed and the steam is cooled to form water?
    1. Melting, evaporation, condensation
    2. Evaporation, condensation, melting
    3. Melting, condensation, evaporation
    4. Evaporation, melting, condensation
26. Which one of the following materials will not be required to show that pressure in a liquid increases with depth?
    1. Tin can
    2. Water
    3. Nail
    4. Collecting jar
27. Which one of the following statements is TRUE about the human excretory organs?
    1. Sweat glands are located in the dermis
    2. Urine is produced by the urethra
    3. The waste products of the lungs are oxygen and water
    4. Water is excreted by the kidneys and the skin only
28. Which one of the following pairs of plants are legumes?
    1. Tomatoes and beans
    2. Cabbage and millet
    3. Groundnuts and peas
    4. Maize and potatoes
29. Std. 8 pupils did the experiment below to investigate a certain method of heat transfer.
    
    Which one of the following were they investigating?
    1. Convection of air
    2. Conduction in solids
    3. Convection in liquids
    4. Radiation of heat
30. Which one of the following will help prevent the spread of cholera?
    1. Spraying chemicals in stagnant water
    2. Wearing protective shoes when passing through water
    3. Drinking filtered water
    4. Covering pit latrines after use
31. Which one of the following is a recommended practice to avoid being struck by lightning?
    1. Sheltering under a tree
    2. Using an umbrella when in an open field
    3. Sheltering while leaning on a wall when it is rainy
    4. Wearing rubber shoes with thick soles during thunderstorms
32. Which one of the following pairs of plants cannot make their own food?
    1. Fern and pine
    2. Toadstool and moss
    3. Puffballs and mould
    4. Cedar and yeast
33. Which one of the following sources of electricity pollutes the environment?
    1. Geothermal generators
    2. Wind-driven generators
    3. Hydro-electric generators
    4. Petrol-driven generators
34. Which one of the following is a natural way of lighting a house? Using
    1. translucent roofs
    2. torches
    3. hurricane lamps
    4. candles
35. Which one of the following pairs of materials will float on water?
    1. Coin and candle wax
    2. Biro pen casing and rubber band
    3. Nail and bottle top
    4. Coin and candle wax
36. Which one of the following groups consists only of external livestock parasites?
    1. Fleas, mites, ticks
    2. Roundworms, lice, mites
    3. Fleas, tapeworms, lice
    4. Mites, roundworms, ticks
37. The diagram below shows a set up that was used to demonstrate a certain property of matter
    
    The coloured water rises up the straw because
    1. liquid expand when heated
    2. liquids occupy space
    3. air occupies speace
    4. air exands when heated
38. Which one of the following consists of groups of food that mainly contain fats?
    1. Maize, coconut, beans
    2. Irish potatoes, groundnuts, maize
    3. Avocado, groundnuts, coconut
    4. Irish potatoes, beans, avocado
39. Which one of the following is a sign and symptom of tuberculosis?
    1. Chest pain
    2. Muscle wastage
    3. Protruding belly
    4. Pale white eyes
40. In which one of the following processes is oxygen gas not used?
    1. Making plant food
    2. Burning
    3. Breathing
    4. Germination of seeds
41. Which one of the following levers has the position of the effort between the load and the fulcrum when in use?
    1. Spade
    2. Wheelbarrow
    3. Claw hammer
    4. Crow bar
42. Which one of the following statements is true about commercial livestock feeds?
    1. Dairy cattle are given commercial feeds to fatten them
    2. They are given to animals to supplement other feeds
    3. They contain a lot of water
    4. They are given to animals only when fodder crops and other feeds are not available
43. Which one of the following vaccines is CORRECTLY matched with its immunization schedule in infants?
                  Vaccine                         Schedule
    
    1. First dose of polio          At 6 weeks
    2. DPT                               At birth and at 10 weeks
    3. DPT and anti-measles   At 14 weeks
    4. Polio and BCG               At birth
44. The presence of thick white and mountain shaped clouds are a sign of
    1. heavy rain falling soon
    2. low temperatures
    3. fine weather
    4. strong winds blowing
45. A person who has difficulties in breathing, has a faster heart beat and feels tired is also likely to
    1. have knock knees
    2. have muscle wastage
    3. have a face like that of an old person
    4. have white eyes
46. The diagram below shows a set-up that is used to investigate a certain aspect of light.
    
    The aspect being investigated is
    1. light travels ina a straight line
    2. refraction of light
    3. reflection of light
    4. passage of light through materials
47. Which one of the following pairs of infections are sexually transmitted?
    1. Gonorrhea and bilharzia
    2. Chancroid and HIV
    3. Syphilis and typhoid
    4. Chancroid and tuberculosis
48. Which one of the following activities can be used to demonstrate rill erosion? Pouring water
    1. at different positions of a slanting soil surface
    2. in channels of soil on a slanting surface
    3. on a flat surface of soil
    4. on a flat surface using a tin with many holes
49. Below are statements about a stage of HIV/ AIDS infection:
    1. If a HIV test is carried out, the result is positive
    2. There are no visible signs
    3. The body can fight other infections
       Which stage of HIV/AIDS infection is described above?
       1. Window
       2. Incubation
       3. Symptomatic
       4. Full blown
50. A glass of water is likely to break if hot water is poured into it because of
    1. sudden expansion of air in the glass
    2. expansion of the heated water
    3. sudden expansion of the inner side of the glass
    4. sudden contraction of the glass wall

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