Erosion By Gravity

What is erosion and what causes it?

• Erosion is the breaking down of rock. Most erosion is caused by water, ice, wind, and gravity.

• Erosion is the process of wearing or being worn by long exposure to the atmosphere.

• Erosion is the removal of weathered rock from one location to another. Most erosion is caused by water, ice, wind, and gravity.

• Erosion is a cavity in the ground, especially in limestone bedrock, caused by water erosion and providing a route for surface water to disappear underground.

Tags

NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-4

How do rock and soil move downhill?

• Gravity constantly pulls on everything on Earth, including rocks. When rocks are weakened and broken apart by weathering, gravity will pull them downhill. Gravity will also cause rocks to fall when a hillside or cliff is undercut by a river or waves along a shoreline, or when rock material and soil become saturated with water.

• Erosion is the removal of weathered rock from one location to another. Most erosion is caused by water, ice, and wind,

• A cavity in the ground, especially in limestone bedrock, caused by water erosion and providing a route for surface water to disappear underground.

• very quickly

Tags

NGSS.MS-ESS2-2

What is another name for the downhill movement of rock material and soil caused by gravity?

• land wasting

• mass wasting

• mass slide

• land mass

Tags

NGSS.MS-ESS2-1

A _____ occurs when weathered rock drops from a cliff and rolls and tumbles downhill.

• flow

• slide

• fall

• creep

A _______ happens when a large mass of rock breaks off as a unit and slips down a hillside along a surface that is parallel to the slope.

• flow

• slide

• fall

• creep

A ______ occurs when rock material and soil become saturated with water and move like a viscous fluid.

• flow

• slide

• fall

• creep

Tags

NGSS.MS-ESS3-2

Imperceptibly slow downhill movement of soil and rock is known as _________.

• flow

• slide

• fall

• creep

Mudflow on the slopes of erupting volcanoes when heat melts glacial ice and the water mixes with volcanic ash are known as ________.

• avalanche

• earthflow

• mudflow

• lahar

Tags

NGSS.MS-ESS2-2

A large rockfall or rockslide on a steep slope is sometimes called ________.

• avalanche

• earthflow

• mudflow

• lahar

Tags

NGSS.MS-ESS3-2

Excessive rainfall may saturate rock and soil, causing it to break away and flow downhill as _________.

• avalanche

• mudflow

• earthflow

• lahar

Tags

NGSS.MS-ESS2-4