What are the two forms of oxygen found in the atmosphere?
Oxygen is found in the atmosphere in the form of
(i) a diatomic molecule having two atoms of oxygen, with chemical formula O2.
(ii) a triatomic i.e., containing three atoms of oxygen, with a chemical formula O3, called ozone.
Why is water essential for life?
Why is the atmosphere essential for life?
You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
