chapter 9 vocab
| Description: | 5 ATHENA ch 9 Scott Foresman 2008 |
| Category: | Science |
| Created by: | bgagnon on 2008-07-26 |
| vocabulary word | definition |
| crust | the outermost and thinnest layer of Earth's layers |
| mantle | the layer of Earth between the crust and core |
| core | the center part of Earth which includes the liquid outer core and solid inner core |
| plate | a large section of Earth's crust and upper mantle |
| mechanical weathering | the breaking down of rocks into smaller pieces by any physical force such as gravity, water, wind, ice, or living organisms |
| chemical weathering | changing of materials in a rock by chemical processes |
| igneous rock | type of rock formed when lava or magma cools and hardens |
| sedimentary rock | type of rock formed when sediments are pressed and cemented together |
| metamophic rock | a type of rock formed when existing rock is heated at high pressures and temperatures |
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