Across
- 2. the layer of earth that is liquid
- 7. the gradual movement of the continents
- 10. a variety of life forms in an area
- 12. when something is pulled away and dropped off somewhere else creating new land
- 13. what the last four planets are called
- 14. a large body of ice
- 17. the biggest layer of earth
- 19. waves that can only travel through solids
- 20. a large elevation on earths surface
Down
- 1. the coolest stars on the HR diagram
- 3. a natural disaster that causes the ground to shake
- 4. what red giants turn into once it sheds its outer layer
- 5. the force that pulls smaller objects towards bigger objects
- 6. what magma turns into when it reaches the earths surface
- 8. The theory on how the earth came to be
- 9. the first layer of earth
- 11. a mountain that erupts and spills lava
- 15. the fastest seismic waves
- 16. molten rock that rises up from the earths core
- 18. violently rotating winds
