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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 |