3-1 Earth's Interior

6. The process where materials with high densities were pulled to the center of the Earth and materials with low densities were pushed toward the surface.
8. A physical layer that is solid, thin, and lies below the lithosphere - it is putty-like.
9. A primary type of seismic wave that squeezes rock - can travel through solids, liquids, and gases.
11. A type of low-density material found in Earth's crust.
12. A wave of energy that travels through Earth and away from an earthquake in all directions.
14. A physical layer that makes up the lower part of the mantle.
17. Rocks or other materials from space that have crashed onto Earth.
18. A compositional layer found at the center of the Earth.

1. The region of the core that is liquid due to very high temperatures.
2. A giant cloud of gas and dust that condensed to form the sun.
3. A compositional layer that is the thin, outer shell of the Earth.
4. The process where unstable materials break down and give off heat or energy.
5. The compositional layer found below the crust.
7. The region of the core that is solid due to higher pressure.
10. The outermost physical layer of the Earth - it is solid and rigid.
13. A secondary type of seismic wave that moves rock side to side - can only travel through solids.
15. Area of the Earth's surface where seismographs cannot detect an earthquake after the waves have passed through the earth.
16. Solid chunk of mantle rock that comes to the Earth's surface during a volcanic eruption.