Natural Hazard - A natural event that can cause harm by people, property, or the environment, Earthquake - A sudden shaking of the ground caused by movement along faults in Earth's crust, Volcano - An opening in Earth's surface where melted rock, gases, and ash can escape, Lava - Melted rock that has reached Earth's surface, Magma - Melted rock located beneth the Earth's surface, Fault - A crack in Earth's crust where blocks of rock move past each other, Landslide - The movement of rock, soil, or Earth down a slope due to gravity., Mudslide - A fast-moving landslide made mostly of mud and water, Flood - An overflow of water onto land that is usually dry., Drought - A long period of little or no rainfall that leads to a shortage of water, Hurricane - A powerful tropical storm with strong winds and heavy rain that forms over warm ocean water., Tornado - A rapidly spinning column of air that reaches from a storm cloud to the ground, Tsunami - A series of large ocean waves usually caused by an underwater earthquake or volcano. , Erosion - The movement or rock or soil from one place to another by water, wind, ice or gravity., Weathering - The process that breaks rock into smaller pieces without moving it. , Seismic Wave - Energy waves released by an earthquake that travel through Earth, Epicenter - The point on Earth's surface directly above where an earthquake begins. ,

4th Grade Vocabulary

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