| A | B |
|---|
| Layers of the Earth | crust, mantle, outer core, inner core |
| Physical Weathering | CHnges int he SIZE and SHAPE of the rocks |
| Chemical Weathering | changes the CHEMICAL makeup of the rocks |
| erosion | wearing away of rocks and dirt by wind and water |
| Plate tectonics | movement of teh Earth's plates |
| Earthquake | when plates slide past one another, causing the ground to shake |
| Mountains | Formed from plates bumping and pushing against one another |
| Volcanoes | plates move or cracks appear and the magma pushes up through the crust |
| Igneous Rocks | rocks form directly from cooled magma |
| Sedimentary Rocks | rocks formed from layers of pressed sediments |
| Metamorphic Rocks | rocks that change from one kind of rock to another by years of heat and pressure |
| Crystals | atoms arranged in a repeating pattern |
| Fossil | formed when minerals or sediment replace a dead organism |
| Ice Age | thousands of years when the Earth was covered with ice and snow |
| glacier | large, slow moving mass of ice |
| sediment | sand, soil, rocks carried by wind and water |
| run-off | water that drains off the land |
| deposition | the dropping of sediments moved by erosion |
| rock cycle | the never ending cycle of rocks changing from one form to another |
