The main source of water in India is
The atmosphere of the earth is heated by radiations which are mainly
All of earth’s water, land and atmosphere, within which life exists is known as
If there were no atmosphere around the earth, the temperature of the earth will
The nitrogen molecules present in air can be converted into nitrates and nitrites by
Ozone layer is getting depleted because of
The amount of carbon dioxide in the atmosphere has increased in recent years. Environmentalists suggest this change is a direct result of the
Low visibility during cold weather is due to
Smog is the mixture of
Choose the correct sequencs.
In nutrient cycle, minerals tend to be dispersed through
What happens when rain falls on soil without vegetational cover?
Soil composition is dependent on weathering because
Top soil contains the following
Which of the following processes is involved in the water cycle?
What would happen, if all the oxygen present in the environment is converted to ozone?
In nitrogen cycle, which bacteria are responsible for nitrification?
Growth of lichens on barren rocks is followed by the growth of
Why is it difficult to integrate nitrogen gas from the atmosphere in the nitrogen cycle of the biosphere?
The process of nitrogen-fixation by bacteria does not take place in the presence of