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Chapter 5
Earth Changes
| Term | Definition |
|---|---|
| Ocean | Large body of salt water |
| Continents | Seven great land areas |
| Continental Shelf | Lies under the ocean at the edge of a continent |
| Landform | A feature of land on Earth's surface |
| Mountain | The highest landform |
| Valley | Low land between hills or mountains |
| Plateau | Flat area of land that is raised much higher than the surrounding area |
| Plain | Land that is wide and flat |
| River | Large body of moving water |
| Canyon | Deep,narrow valley with steep sides |
| Ocean Trench | Similar to a canyon on land |
| Crust | Thin, outer layer of Earth |
| Mantle | Layer immediately below Earth's crust |
| Core | The deepest,hottest layer on Earth |
| Earthquake | Sudden movement of rocks in Earth's crust |
| Volcano | Mountain that builds up around an opening in Earth's crust |
| Magma | Melted rock inside Earth's crust and mantle |
| Lava | Melted rock that reaches Earth's surface |
| Landslide | Rapid movement of rocks and soil down a hill |
| Flood | Occurs when water rises over land that is usually dry |
| Weathering | Breaking down of rocks into smaller and smaller pieces |
| Erosion | The wearing away and movement of weathered rock, sometimes caused by moving water or wind |
| Glacier | A mass of ice that moves slowly across land |
| Deposition | The dropping off of weathered rock |