Across
- 2. What state is the metal at the inner core in? (Solid? Liquid? Gas?)
- 5. the part of the Earth that has cooled and hardened and is exposed to the atmosphere
- 8. Another word for molten rock
- 9. What is the outer core made up of?
- 10. The earth's surface is covered by it's ________ layer
- 11. The largest layer of the Earth
Down
- 1. how many layers of the earth are there?
- 3. The crust is broken up into many pieces called _____.
- 4. is approximately 4.55 billion years old
- 6. was formed approximately 13-14 billion years ago
- 7. How many regions is the mantel divided into?