- Is air a mixture of many gases?
- Which two gases make the bulk of the atmosphere?
- Which gases are found in lesser quantities?
- What are also present in the air?
- Can you draw a picture showing the constituents of air? draw and explain.
- What do we do with the nitrogen?
- Why nitrogen is necessary for the plants?
- Can they take it like the human beings?
- Which is the friend and well-wisher of the plants? How does it help?
- What lives in the soil and the roots of some plants?
Friday, August 10, 2012
Devansh-for you
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