Question # 1

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

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Nitrogen

Oxygen

Carbon di oxide

Hydrogen

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

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Solid pollutant

Air pollutant

Water pollutant

Acid Rain

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

Which is the solution of environmental problems.

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Reducing pollution

Plantation

Protection of endangered

All these

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

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Nitrogen

Oxygen

Carbon Di oxide

Hydrogen

Which factor is responsible for ecological imbalance.

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Over hunting

Change in water supply

Migration

All these

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

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Tertiary consumers

Primary consumers

Producers

Secondary consumers

The organisms upon whihc a redator feeds are called.

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Prey

Carnivores

Herbivores

Producers

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

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Producers

Primary canivores

Herbivores

Top carnivores

Half of the increase in atmospheric carbon dioxide concentrations in the last.............. years has occured since 1980

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100

200

300

400

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

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