"Observation of Landforms" Landform PPT

Description

"Observation of Landforms" Landform PPT

Part One: Explanation of Curriculum Standards

1. Use videos and images to clarify the order of landform observation. (geographical practice)

2. Understand and apply the main observation content in geomorphological observation through graphic materials. (comprehensive thinking)

Observation of landforms PPT, part 2: preview of new knowledge

1. Sequence of landform observation

1. Scale: Larger-scale landforms are often composed of secondary landforms.

2. Observation order

(1) Location: Choose a place with a broad view.

(2) Principle: Follow the order from macro to micro, and from surface to point.

(3) Sequence: first observe the large landforms within the field of view; then observe and describe the secondary landforms; and finally describe the smaller landforms such as river banks and cliffs.

(4) Auxiliary observation: use topographic maps, remote sensing images, etc.

Link Life During the May Day holiday, several geology enthusiasts from Xiao Ming’s class went to Nanjing Liuhe National Geopark to inspect basalt landforms. Please explain the order of inspection.

It is suggested to first observe the overall distribution and shape of geological landforms from a distance, and then carefully examine the microscopic conditions of the landform area.

2. Contents of geomorphological observation

1. Important content: height and slope.

2.Height

3. Slope

(1) Slope: It is mainly expressed by the slope angle or the ratio of vertical distance and horizontal distance, which has a huge impact on production and life.

(2) Slope direction: According to the relationship with the sun, it can be divided into sunny slope and shady slope; according to the relationship with the wind direction, it can be divided into windward slope and leeward slope.

(3) Height and slope combination: can reflect the morphological characteristics of the landform.

4. Other observation contents: the shape, area, spatial distribution of the landform, as well as the ground relief and fragmentation.

Link Life: When traveling in mountainous areas, a traveler wants to know the altitude of the places he passes in time and record the general slope of the route he passes. Please explain how it works.

Tip: You can use your mobile phone or positioning system to get the local altitude; record the length of the route in the area you pass, and calculate the local slope based on the altitude.

Landform observation PPT, the third part: independent detection

1. Judgment of right and wrong

(1) Landform types in a region are often not very different and there is no hierarchy. ()

(2) During the inspection, due to the needs of the actual situation, we first observed the smaller landform features, and then summarized the comprehensive characteristics of the local landforms. ()

(3) Various forms of the ground surface are composed of slopes and approximately horizontal surfaces. ()

(4) In areas with steep slopes, the development of planting can reduce soil erosion. ()

(5) Generally speaking, if the absolute height is large, the relative height is small, and the slope is small, it can be judged to be a plateau. ()

Answer(1)×　(2)×　(3)√　(4)×　(5)√

2. In mountainous areas, roads generally extend in a zigzag shape. The main reason is ()

A.High altitude B.Lower slope

C. Reduce speed D. Reduce energy consumption

Answer B

3. The most significant geographical factor that distinguishes the sunny slopes and shady slopes of mountains is ()

A.Altitude B.Topography

C.Precipitation D.Light

AnswerD

The picture below is a schematic diagram of contour lines in a certain area (contour distance is 50 meters). Read the picture and complete 4 questions.

4. The following statements about the slopes of the sidewalks ①②③④ in the picture are correct ()

A. The slope at ① is the smallest B. The slope at ② is greater than that at ①

C. The slope at ③ is greater than that at ④ D. The slope at ④ is the largest

The size of the analytical slope is mainly judged based on the density of the contour lines. The greater the density, the greater the slope. The contour lines at ④ are the densest and the slope is the largest.

AnswerD

Landform Observation PPT, Part 4 Content: Exploration

Observation of landforms

Question exploration

A student wrote this in the investigation report of "Investigation of Geological Structure of the Small Three Gorges of Jialing River in Beibei (Taking Guanyin Gorge as an Example)":

Guanyin Gorge, also known as Wenbi Gorge, is located between Maobeituo and Shijialiang, with a total length of 3.7 kilometers. It is composed of Lower and Middle Triassic (Feixianguan Formation, Jialingjiang Formation and Leikoupo Formation) limestone and Upper Triassic must be Thick layers of feldspathic quartz sandstone in the Jiahe Formation. The valley is 330~530 meters deep and 200~300 meters wide. The narrowest point of the river in the dry season is 150 meters. The shore wall is steep and accompanied by multi-layered caves; the vegetation is lush and supports thousands of species of life. Rivers and springs cascade down the cliffs, and cars and trains pass by the river. The sound of the river steamer's whistle and the continuous sound of fishing boats add to the interest of the gorge and become a beautiful scenery.

Explore with materials:

In this part of the inspection report, which aspect of the landform is mainly analyzed?

Prompt relative height, slope, geological composition, etc.

Observation of landforms PPT, part 5: Inspection in class

Picture A is a photo taken by students from a certain school when they went to Jiayuguan City, Gansu Province for social practice (photographed at 17:00 on May 16), and Picture B is a remote sensing image near the shooting location. Read the picture and complete questions 1 to 3.

1. The local landform features are ()

A. Flat and open B. Interspersed with mountains and rivers

C. There are many strange peaks D. The glaciers are widespread

2. The forces related to the formation of landform characteristics in the area where the shooting point is located are ()

① Glacial erosion ② Wind erosion ③ Flowing water erosion ④ Flowing water accumulation

A.①② B.②③

C.①②③ D.②③④

3. The river in the photo ()

A.The current is turbulent at this time

B. The seasonal flow changes greatly

C. Low sand content all year round

D. There is no obvious freezing period in winter

Analyzing question 1, reading Figure B, we can see that the area shown in the picture is located on the north side of the Qilian Mountains, and should be the river alluvial fan of the Qilian Mountains. The terrain is flat and open; because the latitude and altitude are not too high, there will not be widespread glaciers; mountains and rivers alternate with each other. There are so many strange peaks that no relevant information can be obtained from the picture. Therefore choose A. Question 2: It can be seen from the materials and combined with the analysis of the previous question that the shooting location is located on the alluvial fan of the river. It is a landform formed by the accumulation of sediment carried by flowing water. Because it is located in the northwest region, the climate is arid, the wind erosion is strong, and there is no glacier activity at the shooting location. So choose D. Question 3: The river in the picture should be mainly supplied by the melted water from the Qilian Mountains. The flood season is in the summer, and the flow is generally large in July and August. A is wrong; the water volume of the river is greatly affected by the temperature, and the seasonal variation of the river flow is large. B is right. ; The vegetation coverage rate in this area is low, and the sand content is large, which is error C; the temperature in winter is low, and there is a freezing period, which is error D. So choose B.

Answer 1.A　2.D　3.B

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For more information about the "Observation of Landforms and Landforms" PPT courseware, please click on the "Observation of Landforms and Landforms" ppt tag.

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Update Time: 2024-09-09

This template belongs to Geography courseware People's Education Press High School Geography Compulsory Course 1 industry PPT template

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