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Earth and Space Sci
| Term | Definition |
|---|---|
| volcanoes | a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust. |
| tectonic plates | the two sub-layers of the earth's crust (lithosphere) that move, float, and sometimes fracture and whose interaction causes continental drift, earthquakes, volcanoes, mountains, and oceanic trenches |
| continental drift | the gradual movement of the continents across the earth's surface through geological time |
| ring of fire | an area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur |
| magma | hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed by cooling |
| Pangaea | a hypothetical supercontinent that included all current land masses, believed to have been in existence before the continents broke apart during the Triassic and Jurassic Periods |
| trenches | a long, narrow ditch (in the ground) |
| mid ocean ridge | major mountain range found in the ocean |
| earthquakes | a sudden and violent shaking of the ground, as a result of movements within the earth's crust or volcanic action |
| convergent boundary | interaction when two plates are moving towards each other, and often this boundary is associated with volcano formation |
| divergent boundary | interaction when two plates are pulling away from each other, and often this boundary is associated with mid ocean ridges |
| convection currents | the cycling of molten rock under the Earth's surface, because hot molten rock rises (less dense) and then once it is cooled it sinks (more dense) |
| oceanic crust | the portion of Earth's crust that is usually below the oceans, and is thinner than the continental crust, and also is made of basalt, and is much denser than the continental crust. |
| continental crust | The portion of the earth's crust that is found under the continents, and is way thicker than the oceanic crust, also contains granite, is less dense than oceanic crust. |
| Law of Conservation of Matter | matter can not be created or destroyed but can be changed into different forms |
| recycling plates | a return to a previous stage in the rock cycling process |
Created by:
Dkerrsci
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