1. (a) Define Air Pollution? (2m)
(b) What are the causes and effects of it?
2. What is Green house effect? Mention any two (2m)
green house gases?
3. (a) Define the term "bio-chemical cycle"? (3m)
(b) Draw a schematic representation of "carbon cycle"?
4. Draw a schematic representation of "Nitrogen cycle"? (3m)
5. What are the main causes of "Water pollution"? (3m)
6. Write the significance of water for living organisms? (2m)