1. For all living things it supports respiration.
2. Is abundant in space and on other planets but not in the form
necessary for life
3. Li is involved in the many reduction – oxygen reactions that are
taking place in the cell;
4. It is the cause of atmosphere leaking into outer space
5. It is the cause of earth attracting meteors to its surface
6. The Earth is unique in the universe because of which
characteristic ?
7. It is the only inhabited planet.
8. It is abundant in space and other planets but not in the form
necessary for life
9. It is the layer that influences the Earth's magnetic field
10. If the sun is too close to Earth it would cause the water to be.
11. It is known as the red planet.
12. It is the only inhabited planet.
13. Ii is Composed of numerous interacting parts or subsystems.
14. The Earth is unique in the universe because of which
characteristic?
15. It represents the unending circulation of Earth's water among
the hydrosphere, atmosphere, biosphere, and geosphere.