"Muds Flow" PPT courseware

Description

"Muds Flow" PPT courseware

Part One Content: Learning Objectives:

1. Know the conditions for the occurrence of debris flows;

2. Know the dangers of mudslides;

3. Understand methods to reduce the hazards of debris flow;

4. Enhance awareness of disaster prevention and disaster resistance.

Debris Flow PPT, Part 2: Dangers of Debris Flow

Wash away roads, railways, hydropower stations and other facilities

Destroy the mine

Bury fertile land

block the river

Destroy houses and buildings

Debris Flow PPT, Part 3: Classroom Activities

Activity 1: Explore the natural causes of debris flow

1. Use loose soil to build a valley model

2. Sprinkle water on the slope of the soil valley model

3. Increase the amount of watering to create a larger flow of water on the slope.

Simulation experiment

1. Less precipitation: Sprinkling water on the slope of the soil valley model: the soil becomes wet and the water flow is small

2. Heavy precipitation: increase the amount of water sprinkled on the slope

Phenomenon: The water flow becomes larger, and more sediment is washed down and accumulated at the bottom of the valley.

3. Are the phenomena occurring in this experiment similar to those in Figure 3-48?

Natural causes of mudslides

1. Mountainous areas (steep terrain)

2. A large amount of loose debris accumulates on the surface

3. Heavy rain or continuous precipitation

Activity 2: Explore the impact of human activities on the formation of debris flows

1. Pile some sand into position B of the soil valley model, and then sprinkle a larger flow of water on the slope. How did the observation change from the previous activity?

2. What human activities can have an effect similar to "piling sand"?

Slag and spoil formed from mining and quarrying

Surface damage caused by construction of roads, railways and other buildings, etc.

Debris flow PPT, part 4: summary

Conditions that produce debris flows

1. Mountainous terrain

2. A large amount of loose debris

3. Heavy rain or continuous precipitation

Ways to reduce debris flow: plant trees.

Escape route in case of mudslide.

Debris flow PPT, part 5: practice

1. The vegetation conditions of A and B are the same. Which area is more prone to debris flow disasters?

2. There is a mudslide on the mountain, and you are right in the middle of the path of the mudslide. In which direction should you escape? ( )

A. Run in the direction of the mudslide

B. Run in the direction of the mudslide

C. Run perpendicular to the direction of the debris flow

D. Run in a direction that is at a certain angle to the debris flow.

3. The following disasters mainly occur in mountainous areas ( )

A. Earthquake

B. Debris flow

C. Typhoon

D. Frost

Debris flow PPT, part 6: textbook exercises

Explain the three main natural conditions that cause debris flows

1. Mountainous areas with steep terrain

2. There is a large amount of loose debris pushed on the surface of the hillside or valley

3. Heavy rain or continuous precipitation

List three human activities that may exacerbate the hazards of debris flows

1. Indiscriminate deforestation, deforestation and land reclamation

2. Unreasonable piling of slag during mining

3. Damage to hillside surfaces during road construction

Keywords: Zhejiang Education Edition seventh grade science PPT courseware free download, debris flow PPT download, .PPT format;

For more information about the PPT courseware "Debs and Rock Flow", please click the Debt and Rock Flow PPT tab.

"Muds Flow" PPT download:

"Muds Flow" PPT Download Part One: Muds Flow Muds flow refers to a special torrent carrying a large amount of sediment and stones caused by heavy rain or other reasons in mountainous areas. Characteristics: Sudden, short-lasting, often accompanied by landslides and collapses, damaging...

"Mudslide" PPT:

"Debris Flow" PPT Part One: Learning objectives: 1. Know the conditions for the occurrence of debris flows; 2. Know the hazards of debris flows; 3. Understand the methods to reduce the hazards of debris flows; 4. Enhance the awareness of disaster prevention and resistance. ... ... ... Debris Flow PPT, Part 2...

File Info

Update Time: 2024-09-09

This template belongs to science courseware Zhejiang Education Edition Seventh Grade Science Volume 1 industry PPT template

Preview