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An opening in Earth’s surface from which lava flows.
 As the lava hardens and builds up, a volcanic mountain forms.

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Deltas form from the dropping of the sediment carried by the river as the water flow leaves the mouth of the river.
Deltas are shaped like a fan.

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A place on Earth’s surface where the land is much higher than the land that surrounds it.
 Some mountains are tall and rocky and others are rounded and covered with trees.
 A mountain area that has a flat top is called a plateau.
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Website: Click this link for the website.

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 Storms and hurricanes can dump large amounts of rainwater that can trigger flooding that increases weathering and erosion.
 Along coastal areas, storms and hurricanes can result in a large and dangerous storm surge wave that crashes into the coast when the storm first strikes land, washing away beach materials and human structures.
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Tsunamis are massive waves caused primarily caused by undersea earthquakes.
 These waves can cause massive destruction along the coastlines of the body of water under which the earthquake occurs.
 Tsunamis can cause significant coastal erosion, washing away sediments and material from a beach and depositing this materials far inland.
 Not all undersea earthquakes cause Tsunamis.
 Rarely, tsunamis can also be caused by large landslides of materials into an ocean or by asteroids or comets landing in an ocean.

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Earthquakes are vibrations on Earth’s surface caused by sudden movement along a fault, or a break in Earth’s surface.
 Some earthquakes cause little damage and some cause a lot of damage.
 Large earthquakes can cause landslides.
 Earthquakes under the ocean can cause huge waves, called tsunamis that destroy land and cause great damage if they come ashore.

Website that explains how an earthquake is formed: Click this link for the website.

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-A flat region of lowlands. Is seen as the bottoms of valleys.
-Wide, flat areas of land

1. Click this link for a video

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-Canyons have steep walls and are formed by erosion and weathering of soft rock caused by the movement of water in rivers.
-A deep valley with very steep sides.
-The sides are often carved from the Earth by a river.
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-A lowland area between higher areas such as mountains.
-Sometimes rivers can wear away land to form valleys.
-v-shaped valleys are formed by the effects of running water.

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