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Earth's dynamic syst
| Term | Definition |
|---|---|
| crater | A bowl-like hole that forms when rock explodes from a volcano during an eruption |
| earthquake | Vibrations within earth caused by the sudden release of energy, usually as a result of the movement of rocks along a fault |
| geyser | Hot water that spews from the surface of the earth |
| hot spring | A spring of naturally hot water, typically heated by subterranean volcanic activity |
| volcano | A landform, 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 |