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

Question # 1

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 # 2

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 # 3

------------- 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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Question # 4

A symbiotic relationship in whihc both speciesl get benefit is called.

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Commensalism

Hebitate

Mutualism

Symbiosis

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Question # 5

Ozone is a layer of gases in ............. atmosphere of the Earth.

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Upper

Lower

Middle

Inner

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Question # 6

Organism in ecologicla communits interact with one anothe rin....... major ways.

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Two

three

Four

Five

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Question # 7

The energy of the Sun in traped as chemical energy by.

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Tertiary consumers

Primary consumers

Producers

Secondary consumers

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Question # 8

Green house gases is

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Carbon di oxide

Methane

Oxides of nitrogen

All these

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Question # 9

During the combustion of fossil fuel. Which gas is ener the atmosphere.

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Nitrogen

Oxygen

Carbon di oxide

Hydrogen

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Question # 10

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

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Oxygen

Carbon dioxide

Nitrogen

Hydrogen

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