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Earth's dynamic syst
| Term | Definition |
|---|---|
| crater | a bowl-like hole that forms when rock explodes from a volcano during eruption |
| earthquake | vibrations within earth caused by the sudden release of energy, usually as a result of the movement of rocks along fault. |
| geyser | a rare type of hot spring that periodically erupts |
| hot spring | a natural spring where groundwater, heated by Earth's internal energy, emerges onto the surface at a temperature substantially higher than the surrounding air temperature |
| volcano | a land form, usually cone-shaped, produced by a collection of erupted material around a vent, or opening on the surface of earth and through which gas and erupted material pass. |
| fossil | preserved remains of an organism, usually from prehistoric times. |