Across
- 4. says that all things in the universe were once contained in a single point
- 8. study of the atmosphere and weather
- 10. innermost layer of the Earth
- 11. all land on Earth
- 12. hypothesis says that the solar system formed from a rotating cloud of hydrogen and helium
- 13. semi-liquid layer of the Earth, found beneath the crust
Down
- 1. all water on Earth
- 2. solid, least dense layer of the Earth
- 3. study of the earth's oceans
- 5. study of space
- 6. study of the solid earth- rock, minerals, soil
- 7. gas layer surrounding Earth
- 9. all living things on Earth