| A | B |
|---|
| geology | the study of solid earth |
| earth layers | the 4 interior sections of the earth |
| reservoir | holds water back in an hydroelectric plant |
| lithosphere | rigid layer made up of the crust and upper mantle |
| convection current | transfer of heat by moving currents within a fluid |
| igneous | type of rock formed from volcanoes |
| metamorphic | type of rock that forms from an existing rock changed by heat/pressure |
| sedimentary | type of rock formed from hardened sediments |
| erosion | process by which water, ice, wind moves fragments |
| deposition | process where sediments settle into a new place |
| rock cycle | process where rocks recycle and change into new forms |
| mineral | occur naturally, solid, definite composition |
| plate tectonics | theory where 20 plates slowly move |
| watershed | land area that supplies water to a river system then ocean |
| aquifer | underground layer of rock or soil that holds water |
| weathering | breaking up of rocks by rain, ice or chemicals |
| impermeable | where water does not pass through easily |
| saturated zone | layer of permeable rock/soil filled with water |
| recharge | new water enters an aquifer from the surface |
