Across
- 3. Hottest, most dense layer of Earth; made of solid iron and nickel.
- 4. The prefix "atmo" means ______.
- 5. The prefix "hydro" means _______.
- 7. Type of rock that forms due to extreme heat and pressure.
- 10. Very hot liquid layer made of iron and nickel.
- 11. The prefix "bio" means ________.
- 12. How many spheres does Earth have?
Down
- 1. The prefix "geo" means _______.
- 2. Type of rock that is formed in layers by cementation and compaction; often contains fossils.
- 6. Cycle in which rocks are changed from one type to another.
- 7. The thickest layer of Earth.
- 8. The outermost layer of Earth; where we live.
- 9. Type of rock that forms from melting, cooling, and hardening of magma/lava.