"Landscape Characteristics of Main Landforms" Natural Geographic Elements and Phenomenon PPT (Lesson 1: Flowing Water Landforms and Coastal Landforms)

"Landscape Characteristics of Main Landforms" Natural Geographic Elements and Phenomenon PPT (Lesson 1: Flowing Water Landforms and Coastal Landforms)

Part One: Strengthening the Implementation of Basic Knowledge

[Self-reading textbook·Fill in key points]

1. Landform

1. Concept: It is a general term for various ______ on the earth’s surface.

2. Classification: According to the causes, there are structural landforms, ______ landforms, coastal landforms, aeolian landforms, ______ landforms, loess landforms and ______ landforms. They can also be divided into secondary landform types.

2. Flowing water landforms

1. Concept: Landforms formed due to the erosion, transportation and ______ action of running water, mainly including ravine landforms and landforms.

2. Valley landform

(1) Formation: In vast mountainous areas, valleys ______ are formed.

(2) Characteristics: The cross section is __-shaped.

(3) Formation of alluvial fan (alluvial fan): When the valley water flows out of the ditch mouth, the flow speed decreases sharply, and the materials carried by the flowing water ______ down, forming a diluvial fan or alluvial fan with the ditch mouth as the apex.

3. river landforms

(1) Formation: Due to the erosion, transportation and ______ action of rivers, river landforms such as river valleys, ______ and estuary deltas are formed.

(2) River valley:

①Composition: It is composed of two parts: valley bottom and valley slope.

②Valley bottom: including ______ and floodplain. The river bed is the lowest part of the river valley, with raised ______ on both sides of the river bed.

③Valley slope: It is the bank slope on both sides of the valley, higher than ______. Due to the incision of the river, ______ is formed. Terraces are part of the valley slope.

(3) Alluvial plains: Alluvial plains are often developed along the ______ rivers, with gentle slopes and relatively ______ terrain.

(4) Estuary delta: A large amount of sediment brought by the river is deposited in ______, with various shapes.

3. Coastal landforms

1. According to their causes, they are generally divided into ______ landforms and ______ landforms.

2. Picture A shows the landforms formed on rocky coasts due to the erosion of waves. They mainly include ______, sea stacks, sea arch bridges, ______, etc.

3. Debris material transported by ______, river water, etc. is deposited near the coast to form marine landforms, including beaches, sand spits, etc. Picture B shows the beach landform, which is a gently sloping ______ beachland toward the sea formed by the accumulation of ______ on the seashore.

Landscape characteristics of main landforms PPT, part 2 content: Pay attention to problem-based teaching

Question 1: What are the common types and causes of flowing water landforms? Important and difficult test points

[Thinking and exploring]

In January 2018, the "Five-Year Action Plan for Lancang-Mekong Cooperation (2018-2022)" was officially released and came into effect, promoting cooperation among the six countries in multiple fields. The Lancang River originates from the Qinghai-Tibet Plateau in my country. After flowing out of the country, it is called the Mekong River. The river landforms are diverse.

[Problem Design]

1. Use "comprehensive thinking" to analyze the characteristics of the valleys of the main stream of the Lancang-Mekong River from the upper reaches to the middle and lower reaches? what is the reason?

Tip: The upstream is a V-shaped valley, and the middle and downstream are trough-shaped valleys. The reason is that the upper reaches are mainly affected by the downward erosion of flowing water; the middle and lower reaches are dominated by the sedimentation of flowing water, and the erosion is dominated by lateral erosion.

2. Use "comprehensive thinking" to analyze what are the main landform types in the middle and lower reaches of the Lancang-Mekong River? What are the features of this landform?

Hint: Flood plains. The piedmont part has a steep slope and the sediment particles are coarse. The main part has a gentle slope and the particles are fine. The part near the river mouth has a very gentle slope and the particles are very fine.

3. From the perspective of "geographical practicality", let's discuss whether a large transportation company plans to build a river port in the river in the picture. Should it be built at A or B? What are the reasons?

Tip: Build at location A. In the picture, point A is a concave bank, where the erosion of flowing water is strong and the river water is deep, so it is suitable for building a river port; point B is a convex bank, where the accumulation of running water is the main force, and the river water is shallow, so it is not suitable for building a river port.

[System Cognition]

1. Different erosion types of rivers and their effects

The erosion types of rivers include: source erosion, downward erosion, and lateral erosion. Their impacts on rivers are different, as shown in the following table:

2. Different river accumulation landforms and their impacts

There are three common types of river accumulation landforms: flood plains, flood plains, and delta plains. Their formation mechanisms and landform characteristics are different, as shown in the following table:

3. Differences in water flow

(1) Differences in the effects of flowing water in different river sections: the upper reaches of the river are dominated by the erosion of flowing water, as shown in A in the figure; the middle reaches of the river are dominated by the transportation and accumulation of flowing water, as shown in B; the lower reaches of the river are dominated by the accumulation of flowing water. Mainly, as shown in C in the figure.

(2) The difference in water flow at meanders of rivers: erosion on concave banks and accumulation on convex banks. As shown below:

[Training to pass the test]

1. The landforms shown in pictures A and B are caused by ()

A. Water erosion B. running water deposits

C． Wind erosion D. wind deposition

2. Regarding the geological process of the formation of oxbow lakes, which statement is correct ()

A. River bank collapse often occurs at A

B． A large number of pebbles can be seen at B

C． ② to ③ may occur during a certain flood

D． A landslide may have occurred at location C

Question 2: What are the common types of coastal landforms? Basic test points

Research point (1) Sea erosion landform

[Thinking and exploring]

There is a huge rock standing on the southwest beach of Gulangyu Island in Xiamen City. There is a large cave in the middle. When the tide rises and falls, when the waves hit the cave, it makes a thumping sound like a drum. People call it "Gulang Stone".

[Explore] What is the external force that forms the Gulang Stone? What are the main landform types formed by this external force?

Hint: Wave erosion. Sea cliffs, sea pillars, sea arch bridges, sea caves, etc.

Landscape characteristics of main landforms PPT, the third part: Carry out structural evaluation of thinking

Structural evaluation of thinking - the city created by alluvial fans

In the west of Gansu's Hexi Corridor and on the north side of the Qilian Mountains, Yumen City is located on the northeast edge of an alluvial fan like a ginkgo leaf. Alluvial fans are mostly distributed in mountain fronts. The middle and lower parts of alluvial fans often contain rich and stable groundwater resources, creating livable oases with dense farmland and dotted villages and towns. The alluvial fan in the picture is formed after the Changma River flows out of the valley in the west of the Qilian Mountains, so it is named Changma alluvial fan. Based on this discussion, what are the main reasons for the formation of oasis on the edge of alluvial fans? ... ... ...

Keywords: Free download of PPT courseware for the compulsory course of high school geography in China Graphics Edition, PPT download of landscape characteristics of main landforms, PPT download of physical geographical elements and phenomena, PPT download of flowing water landforms and coastal landforms, .PPT format;

For more information about the PPT courseware "Landscape Characteristics of Main Landforms, Natural Geographic Elements and Phenomenon, Flowing Water Landforms and Coastal Landforms", please click on the "Landscape Characteristics of Main Landforms ppt Natural Geographic Elements and Phenomenon ppt Flowing Water Landforms and Coastal Landforms" ppt tag.

"Landscape Characteristics of Main Landforms" Natural Geographic Elements and Phenomenon PPT (Aeolian Landform and Karst Landform in the Second Lesson):

"Landscape Characteristics of Main Landforms" Natural Geographic Elements and Phenomenon PPT (Lesson 2: Aeolian Landform and Karst Landform) Part One Content: Strengthen the Implementation of Basic Knowledge [ Self-reading Textbook? Fill in the Key Points] 1. Aeolian Landform 1 ． The concept and classification of aeolian landforms (1) Concept:..