Friday, August 10, 2012

Devansh-for you

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

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