Erosion by Water

Session 1

Erosion by Water

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Think of a song that talks about water. What are the lyrics? What do they mean?

How might musicians think about water differently than scientists?

What is true about water?

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How does water cause erosion?

Raging Water

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1st 1:55

While watching note examples of how rivers and waterfalls change the shape of the land.

Think about additional ways that rivers and waterfalls change the shape of the land.

Lesson Objectives:

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1Define erosion by water.2Distinguish between weathering and erosion.3Identify landforms caused by water erosion.4Describe erosional land features created by waves, longshore currents, rivers, floods, and glaciers.

Essential Questions:

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1 What is the difference between weathering and erosion?2 What is erosion by water?3 How do human activities impact erosion by water?4 How does erosion caused by rivers differ from erosion

caused by glaciers or erosion caused by floods?5 What are some landforms created by erosion by water?

Key Vocabulary

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bedrock, canyon, crust, delta, deposit, deposition, desert, dissolve, erosion, flood, friction, glacier, landform, river, river, rock, soil, soil conservation, stream, solution, stream, transportation, valley, water, waterfall, weathering, wetland, wind

Background Information: Take notes

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Erosion is the process by which rock and soil are removed from a particular location by agents such as flowing water, wind, glaciers, and gravity. It is distinct from other geologic processes such as mechanical or chemical weathering, transportation, and deposition.

Background Information: Take notes

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Weathering is the breakdown of rock, not the removal of rock. Transportation is the movement of eroded rock material by various means, such as wind or water, from one place to another.

Deposition occurs when the transported materials are finally laid to rest, usually at a lower elevation, where they can become part of the soil or eventually once again become rock.

Background Information: Take notes

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Weathering, erosion, transportation, and deposition all act together as a part of the rock cycle.

These processes help to create, shape, and ultimately destroy many of the landforms on Earth, including canyons, deltas, beaches, caves, glacial craters, plains, and sea cliffs.

True or False

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Erosion is always detrimental to the environment.

FALSE

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FACT: while erosion caused by human activities can strip the land of valuable soil, it is also responsible for aiding in the development of soil and for allowing new land surfaces to form, such as deltas and alluvial fans.

True or False

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Erosion only occurs on Earth’s surface.

FALSE

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FACT: erosion by groundwater and erosion on the ocean floor are also significant processes.

True or False

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Weathering and erosion are the same thing.

FALSE

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FACT: weathering is the chemical or physical breakdown of rock, while erosion is the removal of weathered rock materials.

True or False

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Erosion is the process of moving sediments from one place to another.

FALSE

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FACT: erosion refers only to the removal of sediment, not the transportation or deposition of sediment.

Critics Kick up Sand over Shored-up BeachesLesson 1

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READ:

Explore the process of beach erosion and the human fight against it. 

Erosion

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Have you ever seen the effects of erosion in real life?Draw a concept map that starts with the phrase “Erosion by Water.” Watch the video and develop the concept map with the definition of erosion and the different types of erosion by water.

Note that the video erroneously states that erosion is the process of rocks and soil being moved from one place to another. Inform students that erosion is only the removal of rocks and soils. The movement of these sediments is more accurately described as transportation.

WATCH: first 1:14

Erosion

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Create a Venn diagram that shows the similarities and differences between the erosion processes of flowing water with those of glaciers.

2:48 to 6:07

Think about this...

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1. What are the two forms of water that can erode the land? 2. How are erosion and deposition related? 3. How does the amount of vegetation impact the rate of erosion by water?

HOMEWORK

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Go to leannortiz.weebly.com

READ articles and answer questions

1. A Little Rough Around the Edges2. Dude, Where’s My Car?3. Watch Your Mouth4. Critics Kick Up Sand Over Shored-Up Beaches5. Black Sky