VolcanoesA volcano is a mountain or hill,
typically conical,having a crater or vent through which lava,rock fragments,hot vapor,and gas are being or have been erupted from the earth's crust. |
EarthquakesAn earthquake is a sudden and violent shaking of the ground, sometimes causing great destruction,as a result of movement within the earth's crust or volcanic action.
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ErosionErosion is the process of eroding or being eroded by wind,water,or other natural agents.
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LandslidesA landslide is the sliding down of a mass of earth or rock from a mountain or cliff.
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