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Multi-word Results
| plate tectonics |
(used with a singular verb) a theory that scientists use to explain the movement of continents, the eruption of volcanoes, and other changes or events in the earth's geology. The theory of plate tectonics says that the earth's crust is made up of separate sections that are like very large plates. These sections move around constantly because they float on melted rock. The movement of these sections of the crust causes earthquakes. |
| tectonic plate |
one of the plate-like segments of the Earth's crust and upper mantle. The plates form the outer shell of the planet, and they are actually moving very slowly. Where the plates come into contact with each other, their movement can cause or play a part in the eruption of volcanoes, the building of mountains, and the occurrence of earthquakes. |
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