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

Description

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

Part One: Exchange and Discussion

Communicate and discuss experimental plans

Effect of land slope on erosion

Effects of plant cover on erosion

The impact of rainfall on erosion

Exploring the Factors of Land Erosion PPT, Part 2: Exploration Experiment

Tips: Do not move the land model after the experiment begins; pay attention to using containers to catch the "runoff"; carefully observe and record the phenomena during the experiment.

Experiment content

size of slope

With or without plant coverage

amount of rainfall

What factors are related to the extent of land erosion?

Heavy rainfall causes more serious land erosion than small rainfall;

Erosion without plant coverage is more severe than with plant coverage;

Land that is steeper is eroded more severely than it is downhill.

Exploring the Factors of Land Erosion PPT, Part 3: Practical Application

Because the Yellow River flows through the Loess Plateau and undergoes severe erosion, the river water carries a lot of loess and silt, which is why it appears so yellow. Loess erosion produces a large amount of sediment, turning the Yellow River flowing here into the river with the highest sediment content in the world.

Mountain streams during flash floods are like wild horses running wild. The power of the water flow takes away many stones and washes away many plants.

Flash floods can destroy farmland, houses, and roads, trigger mudslides and landslides, and cause losses to people's lives and property.

Dangers of erosion:

1. Destroy the land and devour farmland.

2. Reduce soil fertility and aggravate the development of drought.

3. Siltation raises the river bed and intensifies flood disasters.

4. Silt up lakes and affect development and utilization.

Exploring the Factors of Land Erosion PPT, Part 4: Class Summary

The size of the slope, the presence or absence of vegetation cover, the amount of rainfall, etc. will all affect the degree of land erosion;

Erosion continues to change the topography;

Protecting forests and returning farmland to forests can reduce land erosion.

Exploring the factors causing land erosion PPT, Part 5: In-class training

1. Fill in the blanks

1. Erosion is a type of ( ) that constantly changes the surface form.

2. ( ) can reduce land erosion.

3. Use ( ) to verify the factors that affect the degree of land erosion.

2. Choice

1. Ways people can control erosion are ( )

A. Planting crops in farmland B. Planting cover plants in empty fields

C.Plant rows of trees to protect against wind D.All of the above

2. Which of the following factors will affect the degree of land erosion ( )

A. Land slope size B. Whether there is plant coverage

C.Amount of rainfall D.All of the above

Exploring the Factors of Land Erosion PPT, Part 6: Homework

Write an advocacy letter on protecting the environment.

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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.

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

"Exploring the Factors of Land Erosion" The Earth's Surface and Its Changes PPT Part One Content: Communication and Discussion of Experimental Plans We have initially formulated a research plan on the degree of soil erosion by rainwater and what factors are related to it, and exchanged our experimental plans with classmates. I..

"Exploring the Factors of Land Erosion" Earth's Surface and Its Changes PPT Courseware 2:

"Exploring Factors Affecting Land Erosion" Earth's Surface and Its Changes PPT Courseware 2 Teaching Objectives Exchange research plans on factors affecting land erosion; Experience research experiments on factors affecting land erosion; Name and explain what kind of land is in nature Most vulnerable to intrusion...

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

"Exploring the Factors of Land Erosion" The Earth's Surface and Its Changes PPT courseware 1. Exchange and discuss the experimental plan 1. Group communication and presentation of the experimental plan. 2. Evaluate, modify or improve the experimental plan (see Plans 1, 2, and 3 below). 3. Thinking: In the experiment we...

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Update Time: 2024-09-27

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

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