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If you have ever felt the rumble of an earthquake or seen the eruption of a volcano, you've witnessed EARTHFORCE. For scientists, the word force is defined as a push or pull that causes a change in motion. EARTHFORCE, then, is the pushing and pulling in the core, crust, or water of the Earth that causes motion like eruptions, quakes, or floods. |
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Beneath the surface of the Earth, tremendous EARTHFORCES are at work, pushing and pulling against the crust. |
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The surface of the Earth, called the crust, is constantly moving, creating its own EARTHFORCE. |
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About three-quarters of the Earth's crust is covered with water where EARTHFORCES are always at work. |
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EARTHFORCE
Idea Index: [ Volcanoes | Earthquakes | Floods | Tsunami | Avalanches ] |
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| © 1998 , The Franklin Institute Science Museum. All rights reserved. |