AIR and WATER

2. _____ layer in atmosphere protects us from harmful UV rays.
4. _____ solution: Solute is evenly spreaded through out solvent.
6. water that is fit for drinking.
11. Atmospheric layer having Int Space Stn
14. Amount of water vapour in air.
16. full form of GHG.
18. process of adding chlorine tablets in water to make it fit for drinking.
19. atmospheric layer having ozone layer in it.
20. product of the condensation of water vapour ex rain, snow.
21. most dense layer of atmosphere.

1. Addition of alum in water to increase speed of sedimentation.
3. topmost layer of atmosphere.
5. process by which water changes from a liquid to a gas.
7. process by which water on the ground surface enters the soil.
8. transition of a substance directly from the solid to gas.
9. ______solution: Solute is not evenly mixed in solvent.
10. water movement through a plant and its evaporation leaves and stem.
12. flow of water that occurs over the earth's surface.
13. process using gravity to remove heavier suspended solids- impurities settle down.
15. coldest layer of atmosphere
17. The water cycle is also known as the _____ cycle.
18. change of water vapour into liquid form.