Biogeochemical Cycles

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Biogeochemical Cycles: Overview

This Topic covers sub-topics such as Water Cycle, Greenhouse Effect, Ozone Layer, Carbon Cycle, Ozone Layer Depletion, Ozone Depletion, Biogeochemical Cycles, Oxygen Cycle, Nitrifying Bacteria, Denitrifying Bacteria and, Industrial Nitrogen Fixation

Important Questions on Biogeochemical Cycles

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At the producer level, biogenic nutrients enter the living world and are transported to further trophic levels.

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What do you mean by biogenic nutrients?

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Green house effect is due to the green house gases.

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Write the definition of green house effect.

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Give examples of nitrifying bacteria.

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What are denitrifying bacteria? Give examples.

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What is Haber-Bosch process of nitrogen fixation?

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What is industrial nitrogen fixation?

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Define biogeochemical cycles.

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Choose from the given option:

Gas that causes thinning of the ozone layer.

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What is the ozone layer, and how does it affect the environment?

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What is also known as the biogeochemical cycle?

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Which gas is used by plants during respiration? (Name the gas and do not write formula)

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Which one of the following plays major role for ozone depletion?

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Oxygen is returned to the atmosphere in only one major process. It is :

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Which one of the following is carbon containing molecule?

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Which of the following is true about the nitrogen cycle?

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Which of the following is involved in the fixation of nitrogen in leguminous plants?

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_____ absorbs harmful radiations from the Sun. This prevents those harmful radiations from reaching the surface of the Earth where they may damage many forms of life.

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Rhizobium (a Bacteria) which fixes atmospheric nitrogen are found in nodules growing in