Unit 3

3. A soft, semi-liquid layer of the upper mantle just below the lithosphere
6. Type of boundary Where tectonic plates move apart.
9. Type of boundary Where tectonic plates move toward each other.
12. The outer layer of Earth.
13. Rocks from space that land on Earth.
15. The Center of the Earth - Made of Iron and Nickel.
16. ________plates: Large pieces of Earth's crust that move.
17. Surrounds the inner core and is made of liquid iron and nickel
19. The layer of Earth between the crust and core.
20. __________ waves: slower seismic waves that move only through solids. They shake the ground up and down or side to side, perpendicular to the wave's direction

1. When one tectonic plate goes under another.
2. The rigid outer part of Earth, including the crust and upper mantle.
4. Places where Earth's crust is pulling apart.
5. Type of crust that is The Thick buoyant part of the Earths crust that forms the continents.
7. Rocks formed from cooled lava or magma.
8. Rocks changed by heat and pressure.
9. ____________Currents: the circular patterns created when warm material rises, cools, and then sinks again, causing a continuous flow.
10. _______ Waves: the fastest type of seismic wave that moves through solids, liquids, and gases. They push and pull the ground in the same direction the wave is moving.
11. Type of Rocks made from layers of sediment.
14. Type of crust that is The thinner, denser part of Earth's crust that lies beneath ocean basins.
18. Type of Boundary Where tectonic plates slide past each other.