"Common Landform Types" Landform PPT Courseware

Description

"Common Landform Types" Landform PPT Courseware

Part One: Explanation of Curriculum Standards

1. Use videos and images to identify karst landforms, flowing water landforms, windy sand landforms and coastal landform types. (geographical practice)

2. Describe the main characteristics of four common landforms through pictures and texts.

3. Combined with the natural geographical environment of the regions where different landscapes are located, analyze the formation process of common landform types. (comprehensive thinking)

Lesson 1 Karst landforms and river landforms

Common landform types PPT, part 2: preview of new knowledge

1. Karst landforms

1. Concept: Under appropriate conditions, the materials of soluble rocks (such as limestone, etc.) dissolve in water and are taken away, or re-precipitated, forming various landforms on the surface and underground.

2. Main distribution areas in China: Guangxi, Guizhou, Yunnan and other places are the most widely distributed.

3. Main karst landforms and characteristics

Link Life has this passage in a travel article: “Since ancient times, Guilin has been known as “the most beautiful landscape in the world.” So how beautiful is Guilin’s scenery? There are mountains rising from the plains in various shapes, as well as The meandering, mirror-like Lijiang River..." What kind of karst landform does the "mountains in various shapes and forms rising from the flat ground" mentioned in the text belong to? Why?

Cue peak forest or solitary peak. Surrounded by flat depressions, it has the feeling of being lifted up from flat ground; due to the erosion of flowing water, various mountains are formed.

2. River landforms

1. From the source to the estuary, a river can be divided into upstream, middle reaches, downstream and estuary sections.

2. Geomorphological characteristics of different river sections

3. River meanders and oxbow lakes: In areas with gentle terrain, "S"-shaped river channels are common, which can easily form oxbow lakes when floods occur.

Link Life There are many estuary deltas developed near the estuary of the Yangtze River, which are suitable for farming. Please analyze the reasons from the perspective of terrain and soil.

It indicates that the terrain is flat with little undulations; the water flow is slow, sediment is deposited, and the soil is fertile.

Common landform types PPT, the third part: independent detection

1. Judgment of right and wrong

(1) Karst landforms are only distributed in the southern region of my country. ()

(2) What is called "Bazi" in Guizhou is an isolated peak or a residual hillock left by erosion. ()

(3) The stone pillars of the cave are columnar accumulations formed by the downward development of rocks connected with the ground. ()

(4) The Three Gorges of the Yangtze River are caused by water erosion. ()

(5) Delta landforms all appear at the mouths of rivers. ()

(6) River meanders are mainly distributed in flat areas. ()

Answer(1)×　(2)×　(3)×　(4)√　(5)×　(6)√

2. Corresponding to the mountain rocks and landform types in the area shown in the picture and the external forces that formed them are ()

A. Limestone, spherical weathering landform B. Granite, flowing water accumulation landform

C. Marble, karst landform D. Limestone, karst landform

The landscape in the analytical picture is the landscape of Guilin in my country, which is a typical karst landform. The rock in the picture is limestone, a soluble sedimentary rock.

AnswerD

3. Among the following landforms, which one is not a karst landform ()

A.Stalactite B.Fenglin C.Sinkhole D.Plateau, Liang, Mao

Analysis: Plateau, Liang and Mao are the basic landform types of the Loess Plateau.

AnswerD

4. The river section with a "V" shape in the riverbed profile in the picture is ()

A.a B.b C.c D.d

5. The place where the huge alluvial plain is formed is ()

A.a B.b

C.c D.d

Common landform types PPT, part 4 content: classroom development

The formation and impact of karst landforms

Question exploration

There is a poem describing a landscape similar to the one pictured below:

Traveling to Shihua Cave

Gong Yuyang

Beppu Cave is like a fairy palace, and the plank road across the mountain is illuminated by neon lights.

The white rocks are covered with spring bamboo shoots, and the plain snow hangs over the beams at dawn.

A thousand years of ghostly ax is a scenic spot, and hundreds of generations have accumulated thousands of beautiful bells.

Flowing water never has a purpose, only mountains and rivers are the most powerful.

Explore with materials:

(1) What materials are the rocks in Shihua Cave mainly composed of? How to prove it in field practice?

(2) Please describe the characteristics of the natural geographical environment in the cave.

Tips (1) Limestone. The rock is soluble in acids, bubbles and generates heat.

(2) It is dark and humid, the surface is rugged, and there are rocks hanging down from the top with water often dripping down.

Lectures by famous teachers

1. The strength of karst action and its influencing factors

2. Representative forms and causes of karst landforms

Common landform types PPT, part 5: In-person detection

Read the schematic diagram of the karst cave and complete questions 1~2.

1. Among the following terrain units, the landforms and landscapes in the picture are widely distributed ()

A. Qinghai-Tibet Plateau B. Loess Plateau C. Inner Mongolia Plateau D. Yunnan-Guizhou Plateau

2. The rock that forms the cave is ()

A.Granite B.Limestone C.Basalt D.Marble

Analyzing question 1, the landforms in the picture are karst landforms, which are widely distributed in the Yunnan-Guizhou Plateau. Question 2: Karst landform is a water-eroded landform formed by soluble rocks, and the rock that forms caves is limestone.

Answer 1.D　2.B

3. The landforms and landscapes in this area generally go through four stages of evolution as shown in the figure below. The current stage of evolution of the landforms in this area is ()

A. Seepage hole stage B. Depression basin stage C. Cone mound stage D. Residual mound stage

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For more information about the "Common Landform Types of Landforms" PPT courseware, please click the Landform ppt Common Landform Types ppt tag.

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Update Time: 2024-09-27

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