Class 7 General Science, Chapter # 4, MCQs with answers 

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1. The basic functional unit of an environment: 

• Ecosystem 
• food
• Reproduce 
• Green plants

2.  _____ is the study of the relationship of living organisms with their environment.

• Biology
• Ecology
• Botany 
• Zoology 

3. Each ecosystem has _____ components.

• five
• three
• two
• four 

4. _____ Plants obtain nutrients from the soil and Carbon dioxide from the air.

• roots
• stem
• water
• air

5. Producers, consumers and decomposers are:

• Abiotic components 
• Secondary components
• Primary consumers
• Biotic components 

6. Producers include all the 

• Green plants
• Animals 
• Birds 
• Human beings

7. _____ are animals feeding on producers and other animals for their food.

• Producers 
• Decomposers 
• Microbes 
• Consumers 

8. _____ include herbivores, carnivores and omnivores.

• Consumers 
• Decomposers 
• Microbes 
• Producers 

9.  ______ are primary consumers and depend directly on plants for their survival. 

• Carnivores 
• Omnivores 
• Herbivores 
• Producers 

10. ______ are secondary consumers feeding on primary consumers and get food from other animals. 

• Omnivores 
• Herbivores
• Carnivores
• Producers

11. _____ depend on both plants and animals for their food and are tertiary consumers.

• Omnivores 
• Herbivores
• Carnivores
• Decomposers 

12. ______ include saprophytes (fungi and bacteria)

• Omnivores 
• Herbivores
• Carnivores
• Decomposers 

13.  _______ converts the dead animals and plants into fertilizers, nitrogen and carbon dioxide.

• Producers 
• Decomposers 
• Algae  
• Consumers 

14. The natural home of an organism is called 

• forest
• habitat
• Deserts 
• Mountains 

15. ______ is a place which gets enough rainfall and have warm temperature for lots of trees to grow

• Wet land
• Deserts 
• Forest  
• Grassland 

16. Forest acts as a natural ______ of water.

• absorber
• Observer 
• Producer 
• Habitat 

17. Fungi and mosses are mostly found in _____ habitat. 

• Forest 
• Grassland
• Wet land
• Tundra

18. _____ is a hot, dry and sandy area with little rainfall.

• Forest 
• Grassland
• Desert 
• Tundra

19. The air is very hot and dry in ____ 

• Forest 
• Grassland
• Desert 
• Tundra

20. In desert, most animal sleep during day time and come out at night to eat are called:

• Producers 
• Nocturnal 
• Decomposers 
• Consumers 

21. The place where there is not enough rainfall and occupied mostly by the grasses.

• Forest 
• Grassland
• Desert 
• Tundra

22.  _____ is an environment that is a very cold, windy and treeless area.

• Forest 
• Grassland
• Desert 
• Tundra

23. _____ land is covered with ice and snow almost throughout the year.

• Forest 
• Grassland
• Desert 
• Tundra

24. Tundra is also called _____ 

• Forest 
• Grassland
• Desert 
• Polar 

25. The tundra is characterized by _______

• permafrost
• nocturnal
• Both of them
• None of these

26. A layer of soil and partially decomposed organic matter that is frozen year-round.

• permafrost
• nocturnal
• Both of them
• None of these

27. a/an ______ is a way through which an animal’s body helps it to survive or live in its environment.

• Migration 
• Hibernation 
• nocturnal
• Adaptation 

28. Many birds migrate in the ______ season.

• Spring 
• Autumn 
• Winter 
• Summer 

29. Many _____ migrate to deeper and warmer water

• Plant   
• Fish 
• Bird 
• Insect 

30. _____ is a state of inactivity in animals during the winter season.

• Dormancy 
• Hibernation 
• Aestivation 
• Camouflage 

31. _____ is similar to hibernation but occurs in some animals during summer or dry period

• Dormancy 
• Hibernation 
• Aestivation 
• Camouflage 

32. ______ is a way of concealing when an animal blends with its surrounding environment to help it to hide. 

• Dormancy 
• Hibernation 
• Aestivation 
• Camouflage 

33. _____ is a period of inactivity in plants.

• Dormancy 
• Hibernation 
• Aestivation 
• Camouflage 

34. Most habitats are generally found near the ____

• Mountains 
• Deserts 
• Cities 
• Water  

35. _____ Shows the way how energy flows in the form of food through organisms in an ecosystem 

• Food web
• Energy 
• Food chains
• Link 

36. The _____ is the primary source of energy in a food chain.

• Sun
• plants
• animal
• Water 

37. A food chain always starts with a  _____ , which is an organism that can make its own food.

• Sun 
• Water 
• Animal
• Plant  

38. Each organism in the food chain is called a _____

• Food web
• Energy 
• Food 
• Link 

39. A food web is a network of more than two  _____

• Food chains
• Animals  
• plants
• Links 

40. Living place of an organism is called:

• Habitat 
• Environment 
• Ecosystem 
• Species 

41. Many food chains unite to make a:

• Food cycle
• Food web
• Food pyramid
• Mega food chain

42. An animal that feed on plants is called:

• Primary consumer
• Producer 
• Secondary consumer
• Decomposer 

43. In winter most cold blooded animals disappear because they:

• Die  
• Hibernate 
• Migrate 
• Eaten away

44. The meat eaters are also known as:

• Carnivores 
• Herbivores 
• Omnivores 
• Producers 

Also read: General Science MCQs class 7th, Chapter 3