Precipitation

2. a circular movement of water, causing a small whirlpool.
5. the relations of living organisms to one another and to their physical surroundings.
7. water that falls to the ground in various forms.
12. the effects of mountains on rainfall.
13. amount of salt in water.
16. gasses held around planet earth by gravity, filtering what is allowed in and out.
18. the part of the land near the ocean; the edge of the land.
19. a liquid in which other materials dissolve.
20. distance of a place north or south of the earth's equator.
21. outermost layer of the Earth's rocks and minerals.

1. the movement of the Earth around the Sun.
3. the plants of a particular region.
4. moisture condensed from the atmosphere that falls visibly in separate drops.
6. part of Earth where life can exist.
8. effect of temperatures fluctuating less where land is adjacent to larger bodies of water.
9. incoming solar radiation.
10. light energy radiated in the form of waves or particles.
11. science dealing with the properties, distribution, and circulation of water.
14. all of the animal life present in a particular region.
15. effect due to the Earth’s rotation, a target moves away from the original point
17. great circle of the earth that is everywhere equally distant from the two poles .