Second Term Exam Basic 4 Basic Science

BASIC SCIENCE QUESTIONS

PART A: OBJECTIVE QUESTIONS

(Choose the correct answer from the options given)

1. ______ is one of the natural causes of erosion.
   (A) Sun (B) Rain (C) Star

2. Pollution is the release of ______ into the environment.
   (A) Water (B) Harmful substances (C) Currency

3. Where should we dump refuse?
   (A) On the ground (B) In a waste bin (C) Inside the gutter

4. We can keep a healthy environment through regular ____________.
   (A) Burning (B) Cleaning (C) Damaging

5. ___________ can be used to beautify the school surrounding.
   (A) Flowers (B) Broken bottles (C) Stone particles

6. ___________ is the contamination of the environment.
   (A) Renewal (B) Sanitation (C) Pollution

7. Erosion lowers the level of soil by washing it away.
   (A) True (B) False (C) All of the above

8. We should live in a ___________ environment.
   (A) Dirty (B) Polluted (C) Neat

9. All these can cause erosion except ___________.
   (A) Running water (B) Wind (C) Insects

10. Waste in solid form is known as ___________.
    (A) Refuse (B) Gas (C) Dirty

11. The freezing point of water is ________.
    (A) 100°C (B) 0°C (C) 40°C (D) 180°C

12. ___________ is an example of a safety device.
    (A) Pothole (B) Roadblock (C) Traffic light (D) House

13. Which of these does not need maintenance?
    (A) Diseases (B) Car (C) Clothes (D) House

14. One of these is not a drawing material.
    (A) Pencil (B) Eraser (C) Ruler (D) Hammer

15. The primary source of energy is ________________.
    (A) The sun (B) The moon (C) Stars (D) Sky

16. ___________ is the ability to do work.
    (A) Motion (B) Energy (C) Strength (D) Power

17. The instrument used for measuring temperature is _______.
    (A) Rain gauge (B) Thermostat (C) Thermometer (D) Drug

18. The symbol for Celsius is _____________.
    (A) Cl (B) C (C) S (D) Cel

19. The path along which electricity travels is known as ___________.
    (A) Circuit (B) Current (C) Fuse (D) Avenue

20. ___________ is a synthetic cleansing agent used with water.
    (A) Alcohol (B) Starch (C) Oil (D) Detergent

21. The sun gives us ___________.
    (A) Heat and light (B) Darkness (C) Ice (D) Wind

22. One example of a liquid waste is ___________.
    (A) Smoke (B) Urine (C) Plastic (D) Stone

23. One way to prevent erosion is by ___________.
    (A) Cutting down trees (B) Planting trees (C) Burning refuse (D) Pouring chemicals

24. Burning waste in the open air causes ___________.
    (A) Good air (B) Air pollution (C) Clean environment (D) Ice

25. A dirty environment can cause ___________.
    (A) Diseases (B) Health (C) Clean water (D) Fresh air

26. _________ helps to stop erosion.
    (A) Planting grass (B) Burning land (C) Throwing waste (D) Pouring water

27. When water changes to ice, it is called ___________.
    (A) Melting (B) Boiling (C) Freezing (D) Evaporation

28. Water changes to gas through ___________.
    (A) Boiling (B) Freezing (C) Condensation (D) Mixing

29. Dirty water can cause ___________.
    (A) Good health (B) Diseases (C) Strong bones (D) Clean air

30. When rainwater washes soil away, it is called ___________.
    (A) Erosion (B) Pollution (C) Condensation (D) Wind

31. Which of these is a solid waste?
    (A) Smoke (B) Plastic bottle (C) Oil (D) Urine

32. Air pollution can be caused by ___________.
    (A) Planting trees (B) Smoke from cars (C) Drinking water (D) Reading books

33. Waste that can decay is called ___________.
    (A) Biodegradable waste (B) Non-biodegradable waste (C) Plastic waste (D) Dirty waste

34. Which of these materials can be recycled?
    (A) Plastic (B) Air (C) Smoke (D) Sand

35. Water is needed for ___________.
    (A) Drinking and washing (B) Burning waste (C) Making smoke (D) Causing erosion

36. Electricity is produced by ___________.
    (A) Power stations (B) Plants (C) Houses (D) Schools

37. Which of these should not be thrown in water?
    (A) Plastic waste (B) Fish (C) Water (D) Ice

38. Fire can be put out using ___________.
    (A) Petrol (B) Water (C) Gas (D) Oil

39. _________ is a good way to dispose of waste.
    (A) Burning all waste (B) Dumping in rivers (C) Recycling (D) Littering the ground

40. The part of the earth covered by water is called ___________.
    (A) Atmosphere (B) Hydrosphere (C) Biosphere (D) Space

41. We should wash our hands before ___________.
    (A) Eating (B) Playing (C) Sleeping (D) Running

42. Cutting down trees without planting new ones can cause ___________.
    (A) Desertification (B) Fresh air (C) More trees (D) Rain

43. The best way to store drinking water is ___________.
    (A) In open containers (B) In dirty cans (C) In clean covered containers (D) In broken bottles

44. Which of these can be harmful to the environment?
    (A) Plastic waste (B) Fresh air (C) Clean water (D) Planting trees

45. _________ is used to measure time.
    (A) Ruler (B) Clock (C) Thermometer (D) Balance

46. The instrument used to measure rainfall is called ___________.
    (A) Thermometer (B) Rain gauge (C) Speedometer (D) Barometer

47. The wind helps in ___________.
    (A) Spreading seeds (B) Making the soil strong (C) Causing darkness (D) Cleaning the ocean

48. Which of these is a source of water?
    (A) Well (B) Fire (C) Plastic (D) Dust

49. Which of these is an example of land pollution?
    (A) Throwing waste on the road (B) Drinking clean water (C) Planting trees (D) Recycling

50. The process of treating dirty water to make it clean is called ___________.
    (A) Filtration (B) Pollution (C) Littering (D) Waste disposal

PART B: THEORY QUESTIONS

1. What is erosion?
2. Mention three causes of erosion.
3. List three ways to prevent erosion.
4. What is pollution?
5. Explain three effects of pollution.
6. Mention four ways we can keep our environment clean.
7. What are the two types of waste?
8. Give two examples of solid and liquid waste.
9. Why should we not dump refuse in gutters?
10. Name two things we can do to stop air pollution.