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| crust is outermost layer of the earth. Mostly rock. |
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| The continental crust is the layer of igneous, sedimentary, and metamorphic rocks which forms the continents and the areas of shallow seabed close to their shores, known as continental shelves. |
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| Oceanic crust is the part of Earth's lithosphere that surfaces in the ocean basins. |
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| The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth, similar to the other terrestrial planets, is chemically divided into layers. |
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| The lithosphere is the rigid outermost shell of a rocky planet defined on the basis of the mechanical properties. |
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| The asthenosphere is the highly viscous, mechanically weak and ductilely-deforming region of the upper mantle of the Earth. It lies below the lithosphere, at depths between ~80 and ~200 km below the surface. |
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| The outer core of the Earth is a liquid layer about 2,266 km thick composed of iron and nickel which lies above the Earth's solid inner core and below its mantle. Its outer boundary lies 2,890 km beneath the Earth's surface. |
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| The inner core of the Earth, its innermost part, is a primarily solid ball with a radius of about 1,220 km, according to seismological studies. |
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| a force that destroys things |
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| a force that makes mountains or any land form. |
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| A continent is one of several very large landmasses on Earth. They are generally identified by convention rather than any strict criteria, with up to seven regions commonly regarded as continents. |
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| Seismic waves are waves of energy that travel through the Earth's layers, and are a result of an earthquake, explosion, or a volcano that imparts low-frequency acoustic energy. |
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| Pangaea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras, forming approximately 300 million years ago. It began to break apart around 200 million years ago. |
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