Jessica S

1. A tectonic boundary where two plates slide past each other.
3. An instrument used to record the motion of the ground.
7. A rock having solidified from lava or magma.
10. The science of earth’s physical structure.
11. A very hot area in the mantle.
12. A stream of charged particles.
13. The layering of materials caused by differences in density.
15. A tectonic boundary where the two plates move toward one another.
16. An elastic wave of earth produced by an earthquake or other means.
18. A zone of energetic charged particles that are mainly caused by Solar Wind.

2. A tectonic boundary where the heavier plate sinks below the lighter plate.
4. A region around a planet dominated by the planet’s magnetic field.
5. A movement caused within a fluid because hotter materials rise and colder material sinks.
6. A tectonic boundary where two plates move away from each other.
8. A metric unit of length equal to 1000 meters.
9. The bending of light.
14. An igneous rock formed by cooling magma below the earth’s surface.
17. An igneous rock caused by the rapid cooling of lava.