Earth Science, Weathering and Erosion

What is weathering?

• The movement of sediment

• The breaking-down of sediment

• The dissolving of sediment

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Weathering

What is erosion?

• The movement of sediment

• The breaking-down of sediment

• The dissolving of sediment

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Erosion

What are the two types of weathering?

• Mechanical and Chemical

• Hydrolysis and Carbonation.

• Root Action and exfoliation.

• Frost action and Chemical.

Answer explanation

Correct!

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Weathering

Which THREE factors are MOST influential when regarding weathering?

• Composition of bedrock.

• Time of exposure

• Number of fossils found within the rock.

• Climate

• Density

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Weathering

Which of the following are examples of mechanical weathering? (Hint, more than one)

• Frost Action

• Hydrolysis

• Abrasion

• Oxidation.

• Exfoliation

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Weathering

Which of the following are demonstrations of chemical weathering? (Hint, more than one)

• The dissolving of limestone which results in the formation of limestone caves, sinkholes, and oddly shaped mountains.

• The release of pressure on a rock which results in the peeling of layers, almost like an onion.

• The transformation a feldspar into clay with the exposure of water. 

• The rusting of the iron in a rock.

• The splitting of rocks due to water settling in and freezing within the cracks; increasing thier size

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Weathering

FILL IN THE BLANK,

Chemical weathering dominates in a ____ and ____ climate, whist physical weathering dominates in a ____ and ____ climate.

• Warm and moist,

  Cold and Arid.

• Warm and Arid, Cold and moist

• Warm and Moist,

  Cold and Moist

• Cold and Moist,

  Warm and Arid.

• Cold and Arid,

  Warm and Moist.

Answer explanation

Correct! Though it is important to note that Carbonation occurs more quickly at low temperatures as cold water can dissolve more carbon dioxide than warm water. (The greater the amount of dissolved carbon dioxide, the more acidic the water is and the faster the rate of dissolving.)

Tags

Weathering

A flood plain is...

• A curved lake formed at a former oxbow where the main stream of the river

  has cut across the narrow end and no longer flows around the loop of the bend.

• A natural or artificial wall that blocks water from going where we don't want it to

  go.

• A river or stream flowing into a larger river or lake.

• A low-lying area adjacent to a river where excess water spills onto from the

  river channel.

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Vocab

Water

A meander is...

• A winding curve or bend of a river.

• A curved lake formed at a former oxbow where the main stream of the river has cut across the narrow end and no longer flows around the loop of the bend.

• Any area of land where precipitation collects and drains off into a common outlet, such as a river, bay, or other body of water.

• The organic component of soil

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Vocab

BASIC

Humus is...

• The downhill movement of sediment by gravity acting alone.

•  The volume or amount of water flowing in a stream.

• The organic component of soil.

• A name for a river or stream flowing into a larger river or lake.

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Vocab