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Earth Science
Earth's Changing Surface
Term | Definition |
---|---|
contour lines | lines on a topographic map that indicate areas with the same elevation, or height above sea level |
crust | the thin, rocky outer layer of Earth that makes up the continents and the ocean floor |
topographic map | a map that shows the shapes of surface features and their elevations |
erosion | the movement of rock pieces, or sediment, from place to place |
sediment | weathered rock pieces, deposited by wind, water, or ice |
weathering | the breaking of rocks into pieces or sediment |
deposition | the dropping or releasing of sediment |
core | Earths innermost layer |
dome mountain | forms from magma that pushes up on Earth's crust, but does not break through |
earthquake | a violent shaking of Earth's crust |
epicenter | the point on Earth's surface directly above the focus of an earthquake |
fault | cracks in Earth's crust along which movement may take place |
fault-block mountain | mountains that form along fault lines where blocks of rock fall, are thrust up, or slide |
focus | the point beneath Earth's surface where rock breaks under stress and causes an earthquake |
fold mountain | mountains that form where two plates collide and force layers of rock into folds |
fossil | physical remains or trace of a plant or animal that lived long ago |
lithosphere | solid upper mantle and crust combined to form a rigid shell |
magma | melted rock beneath Earth's surface |
mantle | layer just below Earth's crust |
plate tectonics | the idea of giant plates of rock moving slowly across Earth's surface |
seismic waves | waves sent through Earth's crust during earthquakes |
epicenter | the point on the Earth's surface directly above the focus of an earthquake |