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General Science 8th Class English Medium Chapter 1 Online Test MCQs With Answers

Question # 1

The poisonous and harmsful substances which make the air unfavorable for life are called.

Choose an answer

Solid pollutant

Air pollutant

Water pollutant

Acid Rain

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Question # 2

--------occupy the b ase of pyramid.

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Producers

Primary canivores

Herbivores

Top carnivores

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Question # 3

All the food chains are joined together to form .....

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Food web

Ecologicla pyramid

Tropicla level

None of these

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Question # 4

------------- gas is released when dead organisms are decomposed by the decomposers.

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Oxygen

Carbon dioxide

Nitrogen

Hydrogen

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Question # 5

A relationship where two species live together closely is called

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Symbiosis

Predation

Competitor

None of these

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Question # 6

Th graphical epresentation of tropihic relationship oforaganisms in an ecosystem is called.

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Food Chian

Ecological pyramid

Trophic level

Predation

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Question # 7

The organisms upon whihc a redator feeds are called.

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Prey

Carnivores

Herbivores

Producers

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Question # 8

Carbon cycle and ............. cycle are teh processes in whihc these minerals circulate between the organisms and the environment.

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Hydrogen

Iodine

Oxygen

Nitrogen

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Question # 9

During respiration by the animals, whihc gas is released into the atmosphere.

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Nitrogen

Oxygen

Carbon Di oxide

Hydrogen

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Question # 10

------------- through the food chain is one of the most important functionsof an ecosystem in maintaining balance of nature.

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Waisting of energy

Destroy fo energy

Transfer of energy

Produce of energy

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