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Draw a labelled diagram to show the oxygen cycle in nature.
Or
Draw a neat labelled diagram to show the oxygen cycle in nature.
Or
Describe oxygen cycle in nature.
Oxygen cycle. Oxygen in gaseous form is present in atmosphere (21 per cent).
In water bodies, it is present in dissolved form. From these sources, plants, animals and decomposers take molecular O2 for respiration.
Burning of fuels such as coal, wood, petroleum also use atmospheric O2.
Green plants utilize CO2 and H2O during photosynthesis and release molecular O2 in air and water.
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What are the two things which are essential for all forms of life on the earth?
What is biosphere?
What are the physical components?
What is biotic component?
Does there exist any relationship between the climate and biotic components? If yes, explain with example.
What percentage of oxygen and nitrogen is present in the air?
Name the pollutants by which industries pollute air.
How is balance of carbon dioxide and oxygen maintained in the environment?
What is the percentage of carbon dioxide in the atmosphere of Venus and Mars?
What are the two main ways in which oxygen is consumed and carbon dioxide is produced?
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