Across
- 6. A force of attraction
- 7. This gas is needed for life
- 8. A structure that erupts
- 9. Another word for water vapour
- 10. The top layer of the earth
- 11. Formed outside
Down
- 1. Molten rock outside the earth
- 2. Formed inside
- 3. Molten rock inside the earth
- 4. A rock formed by cooling lava
- 5. The air around our planet