Class 4 Science MCQs Chapter 2

Updated: 02 Oct 2022

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Ecosystem

Chapter No. 2 Test No. 1

1. A sum of all living and non-living things around an organism is called _____
ⓐ Organism
ⓑ Environment
ⓒ Living
ⓓ Nonliving thing

Environment

2. The living and non – living components of an environment ______ with each other.
ⓐ Destruct
ⓑ Interact
ⓒ Social
ⓓ None of these

Interact

3. Every living thing lives in a ________ environment.
ⓐ Particular
ⓑ Non-particular
ⓒ Forest
ⓓ Desert

Particular

4. The living thing and non-living thing component of any environment make
ⓐ Desert
ⓑ Forest
ⓒ Ecosystem
ⓓ Lake

Ecosystem

5. The collection of abiotic and biotic components of an environment is called ____________
ⓐ Desert
ⓑ Forest
ⓒ Ecosystem
ⓓ Lake

Ecosystem

6. The largest desert of the world is ______.
ⓐ Cholistan
ⓑ Thal
ⓒ Sahara
ⓓ None of these

Sahara

7. The Sahara Desert is located in the continent ________.
ⓐ India
ⓑ America
ⓒ Australia
ⓓ Africa

Africa

8. The desert located in Mianwali and Bhakkar in Pakistan is called ______
ⓐ Cholistan
ⓑ Thal
ⓒ Sahara
ⓓ None of these

Thal

9. Thal desert is located in _____
ⓐ Mianwali
ⓑ Bhakkar
ⓒ Both a & b
ⓓ None of these

Both a & b

10. The desert located in southern parts of Punjab is called ________
ⓐ Cholistan
ⓑ Thal
ⓒ Sahara
ⓓ None of these

Cholistan

11. The desert located in Sindh is called __________.
ⓐ Cholistan
ⓑ Thal
ⓒ Sahara
ⓓ Thar

Thar

12. The component of ecosystem is/are.
ⓐ Biotic
ⓑ Abiotic
ⓒ Both a & b
ⓓ None of these

Both a & b

13. The non-living component of an ecosystem is called _______ components.
ⓐ Biotic
ⓑ Abiotic
ⓒ Both a & b
ⓓ None of these

Abiotic

14. Temperature, air, water, light and soil are called _________ components of an ecosystem.
ⓐ Biotic
ⓑ Abiotic
ⓒ Both a & b
ⓓ None of these

Abiotic

15. An example of abiotic components of an environment are
ⓐ Soil
ⓑ Temperature
ⓒ Air
ⓓ All of these

All of these

16. Which of the following is not an abiotic component of an environment
ⓐ Plants
ⓑ Air
ⓒ Water
ⓓ Light

Plants

17. Which of the following as a biotic component of ecosystem?
ⓐ Water
ⓑ Air
ⓒ Fire
ⓓ Plants

Plants

18. Sunlight is abiotic component of the environment like
ⓐ Temperature
ⓑ Herbivores
ⓒ Plants
ⓓ Mammals

Temperature

19. Which of the following is the living component of an environment?
ⓐ Table
ⓑ Plants
ⓒ Pen
ⓓ All of these

Plants

20. Which of the following is the non-living component of an environment?
ⓐ Hen
ⓑ Plants
ⓒ Sunlight
ⓓ Birds

Sunlight

21. An abiotic component of an ecosystem is
ⓐ Micro organisms
ⓑ Animals
ⓒ Plants
ⓓ water

water

22. The living component of an ecosystem are called _________ component.
ⓐ Biotic
ⓑ Abiotic
ⓒ Both a & b
ⓓ None of these

Biotic

Chapter No. 2 Test No. 2

23. Biotic components are divided into _______ groups.
ⓐ Three
ⓑ Four
ⓒ Five
ⓓ Six

Three
Explnation: Producers, Consumers and Decomposers

24. The biotic component of an ecosystem is divided into_________ groups.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

All of these

25. The ______ produce food for themselves and for animals with the help of absorbed water and sunlight.
ⓐ Animals
ⓑ Consumer
ⓒ Plant
ⓓ None of these

Plant

26. The plants produce food for themselves and for animals with the help of
ⓐ Sunlight
ⓑ Absorbed water
ⓒ Both a & b
ⓓ None of these

Both a & b

27. As the plant produce food for them and for animal, so plants are called
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Producers

28. Herbs, climbers, shrubs and trees are ________
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Producers

29. _______ aquatic plants are produces.
ⓐ Lotus
ⓑ Algae
ⓒ Both a & b
ⓓ None of these

Both a & b

30. Lotus, algae are the major source of food for the _______ animals
ⓐ In aquatic
ⓑ Aquatic
ⓒ Desert
ⓓ Land

Aquatic

31. Algae are __________.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Producers

32. The living things which obtain their food from other living thing are called.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Consumers

33. _______ cannot make their own food.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Consumers

34. Consumers _______ make their own food.
ⓐ Can
ⓑ Cannot
ⓒ Bath a & b
ⓓ None of these

Cannot

35. Consumers depend on __________ for their food.
ⓐ Animals
ⓑ Plants
ⓒ Both a & b
ⓓ None of these

Both a & b

36. All the animals are ___________.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Consumers

37. The living thing which breakdown the dead bodies of plants and animals into simple components for their food from these are called __________.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Decomposer

38. Among living organisms bacteria are:
ⓐ Producer
ⓑ Consumer
ⓒ Viruses
ⓓ Decomposers

Decomposer

39. Fungi are an example of ________
ⓐ Producer
ⓑ Consumer
ⓒ Viruses
ⓓ Decomposers

Decomposer

40 Which of the following organisms are decomposers?
ⓐ All plants
ⓑ Lions
ⓒ Rats
ⓓ Bacteria and fungi

Bacteria and fungi

41. Bacteria and fungi are _________.
ⓐ Producers
ⓑ Consumers
ⓒ Decomposer
ⓓ All of these

Decomposer

Chapter No. 2 Test No. 3

42. Corals look like stone but actually these are _________.
ⓐ Plants
ⓑ Animals
ⓒ Stone
ⓓ Rock

Animals

43. _______ are animals.
ⓐ Algae
ⓑ Lotus
ⓒ Corals
ⓓ Both a & b

Corals

44. Corals are a part of beautiful ecosystem under ________
ⓐ Ground
ⓑ Desert
ⓒ Rock
ⓓ Sea

Sea

45. Corals usually live in form of colony which is called ________.
ⓐ Coral land
ⓑ Coral colony
ⓒ Coral ocean
ⓓ Coral reef

Coral reef

46. ________ are also called rainforests of the ocean.
ⓐ Coral
ⓑ Algae
ⓒ Lotus
ⓓ Bacteria

Coral

47. Corals are also called ________ of the ocean.
ⓐ Rainforests
ⓑ Land forests
ⓒ Ocean forests
ⓓ None of these

Rainforests

48. Corals are look like _______ but actually these are animals.
ⓐ Stones
ⓑ Trees
ⓒ Dolphin
ⓓ Star fish

Stones

49. The sun is the main source of energy in a/an _______.
ⓐ Electric system
ⓑ Water
ⓒ Ecosystem
ⓓ None of these

Ecosystem

50. The plants make food with the help of :
ⓐ Sunlight
ⓑ Carbon dioxide
ⓒ Water
ⓓ All of these

All of these

51. Plants produce ______ during photosynthesis.
ⓐ Oxygen
ⓑ Carbon dioxide
ⓒ Hydrogen
ⓓ All of these

Oxygen

52. During respiration animals produce ___________.
ⓐ Oxygen
ⓑ Carbon dioxide
ⓒ Hydrogen
ⓓ All of these

Carbon dioxide

53. Animals produce_______ which is used by plants to make food.
ⓐ Oxygen
ⓑ Carbon dioxide
ⓒ Hydrogen
ⓓ All of these

Carbon dioxide

54. The self-sustaining and durable ecosystem is called _________ecosystem.

ⓐ Chain

ⓑ Balance

ⓓ Small

Balance

55. If the number of the aquatic producers increases in a pond beyond the limit, then fish and other living thing will die due to lack of _________.
ⓐ Oxygen
ⓑ Carbon dioxide
ⓒ Hydrogen
ⓓ All of these

Oxygen

Herbivores

Carnivores

58. The animals which eat both plants and animals are called ______
ⓐ Herbivores
ⓑ Carnivores
ⓒ Omnivores
ⓓ None of these

Omnivores

Can

60 The series of eating and being eaten in an ecosystem is called __________.
ⓐ Balance diet
ⓑ Food chain
ⓒ Carnivores
ⓓ Herbivores

Food chain

61. Which of the following shows the correct food chain in an environment?
ⓐ Sun→Consumers→Producers→Decomposers
ⓑ Sun→Consumers→Producers→Decomposers
ⓒ Sun→Producers→Decomposers→Consumers
ⓓ Sun→Producers→Consumers→Decomposers

Sun→Producers→Consumers→Decomposers

Producers

Second

Carnivores

65. In the following food chain Sunlight→Grass→Rabbit→Lion, the relation of loin to rabbit is an example of:
ⓐ Predation
ⓑ Parasitism
ⓒ Mutualism
ⓓ Production

Predation

Producers

Chapter No. 2 Test No. 4

67. The animals which eat by killing another living thing is called __________.
ⓐ Predator
ⓑ Prey
ⓒ Omnivores
ⓓ None of these

Predator

Prey

70. The living thing which is killed and eaten by the predator is called a ____.
ⓐ Predator
ⓑ Prey
ⓒ Omnivores
ⓓ None of these

Prey

Predation

72. “Deer is killed by lion”, here lion is the predator and deer is _________.
ⓐ Predator
ⓑ Prey
ⓒ Omnivores
ⓓ None of these

Prey

Predator

Irreversible

22nd April

August

78. What is an ecosystem?
ⓐ System of non-living things in an environment
ⓑ Area having a group of living and dead things
ⓒ System of living things in an environment
ⓓ The collection of abiotic and biotic components in an area

The collection of abiotic and biotic components in an area.

Living things

80. For the conservation of ecosystem:
ⓐ Forests are being cut
ⓑ Roads are being built
ⓒ Tree plantation is being done
ⓓ Factories are being installed

Tree plantation is being done

Decomposer

Class 4 Science MCQs Chapter 2

Ecosystem

Chapter No. 2 Test No. 1

Chapter No. 2 Test No. 2

Chapter No. 2 Test No. 3

Chapter No. 2 Test No. 4

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