1. What is the area around certain person or thing?
2. What all those things which are related to our life together called?
3. What are biotic elements?
4. Which of the following is not an abiotic element?
5. What do plants use given out by living things during respiration, to make food?
6. What is conversion of water into vapour to clouds and return to earth as rain called?
7. What do living things use from the atmosphere for respiration?
8. What acts like a protective umbrella?
9. When is Ozone Day observed?
Originally posted 2016-02-06 17:31:02.