"Exploring the Factors of Land Erosion" Earth's surface and its changes PPT

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"Exploring the Factors of Land Erosion" Earth's surface and its changes PPT

The first part: communication and discussion of experimental plans

We have initially formulated a research plan on the degree of soil erosion caused by rainwater and what factors are related to it, and are sharing our experimental plans with classmates.

What else is unscientific and unreasonable about our experimental plan? Need modification?

What issues should we pay attention to during the experiment?

The effect of land slope on soil erosion

The impact of rainfall on soil erosion

Effects of plant cover size on soil erosion

Exploring the factors causing land erosion PPT, Part 2: Experiments to explore erosion

Conduct experiments according to the modified experimental plan to verify our speculations.

hint:

Do not touch the land model once the experiment has begun;

Be careful to use containers to catch “runoff”;

Carefully observe and record the phenomena in the experiment.

What phenomena did we see in the experiment, and what do these phenomena mean?

The impact of land slope on soil erosion:

Land with a large slope will cause more serious soil erosion than a land with a small slope.

The impact of rainfall on soil erosion:

Heavy rainfall will cause more serious soil erosion than light rainfall.

The impact of the size of plant cover on soil erosion:

Without plant coverage, soil erosion is more serious than with plant coverage.

Exploring the factors causing land erosion PPT, part three content: Classroom insights

What insights did you gain from studying this lesson?

Rain is an inevitable natural phenomenon, so the erosion of land by water flowing on the surface of the earth is also inevitable. But human activities can increase or decrease the extent of land erosion. If afforestation and scientific and rational use of land are used, the degree of land erosion will be reduced. If there is indiscriminate deforestation and overgrazing, the degree of land erosion will be aggravated.

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For more information about the PPT courseware "The Earth's Surface and Its Changes Exploring the Factors of Land Erosion", please click the Earth's Surface and Its Changes ppt Exploring the Factors of Land Erosion ppt tag.

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Update Time: 2024-11-20

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

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