"The Effect of Rivers on Land" Earth's surface and its changes PPT

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"The Effect of Rivers on Land" Earth's surface and its changes PPT

Part 1: Exploring the impact of rivers on land

Will the river erode the land on both sides?

If a river flows from rugged mountainous terrain to a gentle place, what happens to the sediment carried by the river?

Recall the sedimentation experiment we did earlier

What happens to the soil in the water when you stir it with chopsticks?

When the stirring stops, what happens to the water that was originally moving and the soil it carried?

What does the deposited soil look like?

Let's do an experiment.

Mound a slope with soil at one end of the box, one high on one side and low on the other, and pat it down slightly. Be careful not to fill the 1/3 of the empty box with soil. Then use a small stick to dig a "river channel" about 1 cm wide and deep on the slope.

Observe the "river channel" where no river water flows, draw the shape of the river channel on the recording paper, and mark its width and depth on the map.

Estimate when a river forms, where the flow velocity is high and where the flow velocity is slow? Where does erosion occur and where does sedimentation occur?

PPT on the role of rivers on land, part 2: topography and landforms formed by erosion and sedimentation

Erosion and sedimentation occur all the time in nature. Erosion causes soil loss in some raised places on the ground, while sedimentation fills in some low-lying places. Erosion and sedimentation form different topography and landforms on the earth.

The erosion of rivers is also reflected in the formation of V-shaped valleys, U-shaped valleys, meanders, oxbow lakes, waterfalls and other landforms.

Sedimentation can also form deltas, alluvial fans, beaches and other landforms.

Besides flowing water, what other natural force can cause erosion and sedimentation of land? Read the unit library to learn about the erosion and deposition of land by other natural forces such as wind, glaciers, waves, etc.

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For more information about the PPT courseware "The Earth's Surface and Its Changes and the Effects of Rivers on the Land", please click the Earth's Surface and Its Changes ppt The Effect of Rivers on the Land ppt tag.

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"The Effect of Rivers on Land" Earth's surface and its changes PPT download:

"The Effect of Rivers on Land" The Earth's Surface and Its Changes PPT Download Part One: Exploration and Discovery Rivers are the collective name for larger natural water flows on the earth's surface. They are formed by runoff generated by melting ice and snow or rainfall. What rivers do to land Explore rivers..

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Update Time: 2024-11-11

This template belongs to science courseware Fifth Grade Science Volume 1, Textbook Edition industry PPT template

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