Earth

1. The central portion of the earth which lies below the mantle.
3. A type of oxygen that is produced by electricity and is in the air, mostly after a thunderstorm.
5. Spheroid this is the shape of the Earth slightly flattened at the poles and bulging at the equator
6. All of the living human inhabitants of the earth
10. Large areas of salt water that surround much of the earth's surface.
11. The act of rotating around a center or axis.
12. a living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli.
14. this is the imaginary line that is halfway between the North Pole and the South Pole
15. a woody perennial plant, typically having a single stem or trunk growing to a considerable height and bearing lateral branches at some distance from the ground.

2. a colorless, odorless reactive gas
4. A system formed by the interaction of a community of organisms with their physical environment.
7. A living organism lacking the ability to move
8. The outer layer of the earth's surface.
9. The process of moving around a center or axis.
13. the type of environment in which an organism or group normally lives or occurs.