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The Relentless Earth
7th Grade Unit 4 "The Relentless Earth" Study Guide. Test Tuesday, 2/9
Term | Definition |
---|---|
Compostitional Layers | 4 compostitional layers; crust, mantle, outer core, inner core. (3 layers according to the book) |
Crust | Top compostitional layer. Contains oxygen, silicon, and aluminum. |
Mantle | Middle compostitional layer. Hot, slow-flowing, solid rock. |
Core | Inner compostitional layer. 1/3 of of Earth's mass, and made of iron and nickel. |
Lithosphere | The whole crust and part of the mantle. Is divided into tectonic plates. |
Tectonic Plates | Pieces of the lithosphere that float on the asthenosphere: collide, pull apart, and slide past each-other. |