"Composition and Vertical Stratification of the Atmosphere" Physical Geographic Elements and Phenomenon PPT

"Composition and Vertical Stratification of the Atmosphere" Physical Geographic Elements and Phenomenon PPT

Part One: Strengthening the Implementation of Basic Knowledge

[Self-reading textbook·Fill in key points]

1. Composition of the atmosphere

1. Composition: _____, solid impurities and water vapor.

2. Composition and function of dry air

3. water vapor

(1)The water vapor content varies with _____ and _____.

(2) Water vapor is an important factor affecting weather changes.

2. Vertical stratification of the atmosphere

1. Classification basis: changes in _____, physical properties and movement conditions of the atmosphere.

2. Comparison of features of each layer

The composition of the atmosphere and vertical layering PPT, the second part of the content: Pay attention to problem-based teaching

Question 1: What are the components of the atmosphere? Basic test points

[Exploration 1] What is the main role of carbon dioxide shown in this diagram?

Tip: An important raw material for photosynthesis of green plants.

[Exploration 2]What role does the oxygen produced in this picture play in the geographical environment?

Tip: Oxygen is an essential substance for many biological life activities.

[System Cognition]

(1) Today’s atmospheric composition is the result of the long-term evolution of the earth and will not change significantly in the short term. However, pollutants emitted by human activities will affect the composition and content of the atmosphere, causing air pollution.

(2) Carbon dioxide in the atmosphere mainly absorbs energy from ground radiation and only rarely absorbs solar radiation.

[Training to pass the test]

1. Regarding the composition of the Earth's lower atmosphere, which statement is correct ()

A. Composed mainly of oxygen

B． Made of dry air

C． Made of oxygen and water vapor

D． Composed of dry air, water vapor and solid impurities

2. Which of the following is not a component of dry air ()

A. Nitrogen B. oxygen

C． carbon dioxide d. water vapor

3. Regarding the description of the functions of the components of dry air, the correct statement is ()

①Nitrogen is the basic raw material for photosynthesis of green plants; ②Oxygen is an essential element for the healthy growth of organisms; ③Carbon dioxide can insulate the ground; ④Ozone can absorb a large amount of ultraviolet rays from the sun.

A. ①② B． ①③

C． ②④ D． ③④

Question 2: How to identify the vertical stratification of the atmosphere Basic test points

[Thinking and exploring]

During the Tomb Sweeping Day holiday on April 5, 2019, Teacher Wang and his family took a flight from Jinan to Kunming to travel. It was still drizzling when we took off, but soon after we took off, the sky was clear and the sun was shining.

[Exploration 1] Why does the weather change described in the material occur?

Tip: The reason for the drizzle during takeoff is that the plane is still in the troposphere. When the plane passes through the troposphere and enters the stratosphere, the weather is fine.

[Exploration 2] What characteristics should the atmosphere have that is conducive to aircraft flight?

Tips: The upper part of the atmosphere is hot and the lower part is cold. Convection is not easy to form. The main movement is horizontal. The atmosphere is stable, and there are no clouds or rain in this layer. The weather is clear and the visibility is good.

[Exploration 3] Can I make phone calls during takeoff and landing? Why?

Tip: No. Making phone calls on an airplane will interfere with the aircraft's communications, navigation, operating system, and the wireless signal connection between the aircraft and the ground.

[Training to pass the test]

The picture below is a schematic diagram of the vertical stratification of the atmosphere. Read the picture and complete questions 1-2.

1. The curve in the figure that correctly represents the vertical change in atmospheric temperature is ()

A. ①B. ②

C． ③D. ④

2. The atmosphere where the "Shenzhou" spacecraft launched by my country is orbiting ()

A. The temperature is -50~20 ℃ B. Temperature decreases steadily with increasing altitude

C． The lowest temperature is about -80 ℃ D. The highest temperature is about 40 ℃

The composition and vertical stratification of the atmosphere PPT, the third part: carrying out structural evaluation of thinking

Structural evaluation of thinking—Global atmospheric environmental issues

According to statistics from the U.S. National Snow and Ice Data Center, in late February 2018, the ice area of ​​the Arctic Ocean dropped to its lowest point on record, about 1 million square kilometers less than normal, which is equivalent to reducing the area of ​​​​Egypt. Some scientists believe that global warming may be underestimated. The U.S. Environmental Protection Agency found that for every 1% depletion of total ozone, ground-level ultraviolet rays will increase by 1.5% to 2%. They predict that if there are no restrictions on the production and consumption of chlorofluorocarbons, the total amount of ozone on the earth will be reduced by 25% by 2075 compared with 1985. People can't help but ask, what are the causes of more and more atmospheric environmental problems, and how should we protect our "home"?

[Your evaluation and thinking are perfect]

Student A did not grasp the essence of the question and only talked about it in general terms; Student B’s answer was between a multi-point structure and a relational structure, but the thinking was unclear and lacked organization, and there was no detailed analysis of specific issues; Student C’s answer was relatively It is accurate and belongs to the relational structure. It can analyze specific questions in detail, but the analysis is not detailed enough and some key points of answering the questions are missed.

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