Earth Science

2. the crust and upper mantle.
4. when a gas turns into a liquid.
6. underwater mountain chains.
9. a place where lava reaches the surface.
11. the point within Earth where faulting begins.
14. separates the crust and the mantle.
16. a supercontinent formed by all the other continents millions of years ago.
17. a sudden release of stored energy caused by tectonic forces.
18. the point directly above the surface.
20. gas that protects Earth from ultra-violent waves.

1. records earthquake events
3. transfers energy from one point on Earth to another point on Earth.
5. parts of the crust that move above the mantle.
7. when a liquid turns into a gas.
8. mixture of gases that surround Earth.
10. the lower part of the upper mantle that has plastic, flowing properties.
12. the thinnest part of Earth's structure.
13. total amount of energy released from an earthquake.
15. Hot material rises while cool material sinks.
19. when electromagnetic waves that travel through space.