Geology Quiz

3. the current and the latest of the four geologic eons in the Earth's geologic time scale
5. an amount of time
7. when greenhouse gases traps heat within earth’s atmosphere.
12. a layer of gas protecting earth from ultraviolet sun rays
13. the first and oldest of the four known geologic eons of Earth's history
14. the second of the four geologic eons of Earth's history
16. when most of life goes extinct in a short period of time
19. dead compressed plants/animals fr. several hundred million years ago

1. the process by which green plants and certain other organisms transform light energy into chemical energy.
2. carbon dioxide CO2, methane, etc.
4. change to become better at surviving.
5. a very tectonically active period in the Earth's history
6. small pieces of asteroids (may collide with earth)
8. an “eternity”
9. how life forms change to become better adapted to their environment.
10. very long time
11. name of an ancient super continent
15. a large piece of rock from outer space, smaller than a planet
17. animal living both in water and on land
18. continents or land masses moving around on earth’s crust