Water and wind erosion

What is the major factor that affects the ability of a stream to erode land?

• The sediment deposits

• The stream's speed

• The deposits of slowing water

As the stream erodes the land, what features are likely to form in steep areas?

• V-shaped valleys and waterfalls; flood plain, oxbow lakes, and meanders

• Alluvial fans ad deltas from sediment

• A volcano

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NGSS.MS-ESS2-2

Compare and contrast deltas and alluvial fans.

• Often contain rapids and waterfalls, the water in a mountain stream moves quickly because it is flowing down.

• As water flows down a hillside through fillies, the gullies flow together to form streams.

• Deltas and alluvial fans both form when a river slows down or ends, depositing sediment. However, deltas form in water and alluvial fans form on land.

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NGSS.MS-ESS2-2

Where is the world's tallest waterfall? pg 715

• Fremont, CA

• Angels Falls, Venezuela

• Mt. Shasta

What process forms caves and sinkholes?

• Formed by the chemical dissolution of underground rock by the flow of acidic water. If erosion weakens a layer of limestone below the ground, it may collapse and form a sinkhole

• Limestone erodes away forming a stream

• The oxbow weakens forming a sinkhole

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NGSS.MS-ESS2-2

What force provides the energy for the erosion caused by running water?

• Sinkholes causes erosion

• if the water drips down o the floor, a pillar of minerals form.

• Gravity provides the energy for erosion caused by the downward flow of rivers and streams to the ocean.

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NGSS.MS-PS2-4

What picture represents a meander?

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NGSS.MS-ESS2-2

Which image represents erosion?

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NGSS.MS-ESS2-2

Which image represents an oxbow?

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Choose the image formed as a stalactite.

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NGSS.MS-ESS2-2

NGSS.MS-ESS2-4