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4th Gr.
Earth and its changes
| Term | Definition |
|---|---|
| Landform | a natural or physical feature of the earths surface |
| Continent | a large land mass surrounded by oceans or other land |
| Continental shelf | The edge of a continent that connects the shore to the sea |
| Continental slope | a steep drop into the ocean, could be a cliff |
| ocean ridges | under ocean mountain ranges |
| crust | solid rock that makes up Earth's outermost layer |
| mantle | layer of rock below the crust |
| outer core | the liquid layer below the mantle made up of iron |
| inner core | solid material at Earths center. |
| inner core | the hottest part of the earth |
| plates | sections of earths crust and upper mantle |
| Mountain | a tall land form that rises to a peak |
| Fold | a bend in the rock layers that happen when plates push together at the edges one way mountain form |
| Plains | the flattest land form Without hills or mountains |
| Plateau | a high land form with a flat top |
| earthquake | a sudden shaking of earths crust |
| Fault | A long narrow crack in earths crust |
| seismic waves | vibrations caused by earthquakes |
| seismogragh | an instrument that detects and records earthquakes |
| tsunami | giant ocean waves, often caused by earth quakes |
| volcano | a mountain that builds up around an opening in the Earths crust |
| magma | melted rock inside a volcano |
| Lava | magma that reaches Earth's surface |
| Plates | large sections of Earth's crust and mantle |
| rivers | a large natural body of water that flows into the sea or lake |
| streams | smaller narrow rivers |
| channel | a body of water that connects two larger bodies of water |
| canyon | a deep valley with very steep sides , often carved from the Earth by a river |
| cliff | a steep face of rock and soil |
| delta | a triangular shaped area of low, watery land formed at the mouth of a river, from the silt, sand and small rocks that flow downstream |
| Dune | a hill or a ridge made of sand , that is constantly changing |
| tributary | a stream or river that flows into a large river |
| Weathering | the slow process that breaks rock down into smaller pieces |
| physical weathering | rocks change size or shape from water, wind or other natural causes moving over them. |
| Chemical weathering | weakening and breakdown of rock by chemical reactions.Can be caused by oxygen, acids and carbon dioxide |
| erosion | weathering and removal of rock or soil |
| deposition | dropping off of weathered rock |
| glaciers | thick sheets of moving ice that changes the shape of land |
| glacial debris | small rocks or large boulders left behind by a glacier. |
Created by:
s.carter506
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