"The Cosmic Environment of the Earth" The Earth in the Universe PPT (The Impact of the Sun on the Earth in the Second Lesson)

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"The Cosmic Environment of the Earth" The Earth in the Universe PPT (The Impact of the Sun on the Earth in the Second Lesson)

Part One: Strengthening the Implementation of Basic Knowledge

[Self-reading textbook·Fill in key points]

1. The impact of solar radiation on the earth

1. Sun Profile

(1) Shape: Huge ball of hot gas.

(2)Main ingredients: _____.

(3) Surface temperature: about 6 000 K.

(4)The atmosphere of the sun:

2. Sun radiation

(1) Concept: The phenomenon that the sun continuously radiates energy into the universe in the form of _____.

(2) Energy source: _____ inside the sun.

(3) Features: Solar radiation energy is mainly concentrated in the _____ part, accounting for about 50% of the total solar radiation.

3. impact on earth

(1)Provide _____ and _____ to the earth.

(2) Most of the _____ on the earth comes directly or indirectly from the sun. Such as coal, oil, etc.

(3) Solar radiation maintains _____ on the surface and provides power for _____, atmospheric movement, biological and human activities on the earth.

2. The impact of solar activity on the earth

1. Concept: A general term for various activities and changes in the solar atmosphere.

2. type

3. Change cycle: about _____ years.

4． impact on earth

(1) Impact on Earth’s climate

Climate change on the earth has a certain _____ relationship with sunspot activity. In the peak years and valley years of sunspot activity, the probability of abnormal climate on the earth increases significantly.

(2) Impact on the Earth’s ionosphere

The strong electromagnetic waves emitted when a flare erupts will strongly interfere with the ionosphere high above the Earth, causing the signal quality of _____, satellite communications, shortwave broadcasting, aerospace and aviation to decrease or even _____.

(3) Impact on the Earth’s magnetic field

①Solar wind will interfere with the Earth’s magnetic field, causing _____ phenomenon.

② High-energy charged particles "bombard" the Earth's upper atmosphere, causing air molecules to _____, causing the atmosphere to glow, and beautiful _____ phenomena to appear over the North and South Poles.

PPT on the cosmic environment where the earth is located, part 2: attaching importance to problem-based teaching

Question 1: What impact does solar radiation have on the earth? Important and difficult test points

[Thinking and exploring]

"Sichuan dogs barking at the sun" comes from Liu Zongyuan of the Tang Dynasty, "Reply to Wei Zhongli on the Master's Book of Taoism": "Quzi Fu said: 'The dogs in the city are barking, and the barking is strange.' I went to Wenyong, in the south of Shu, and it rained for few days. When the sun rises, dogs bark." This means that Qu Yuan once wrote a poem: "The dogs in the city are barking, and the barking is strange." I heard in the past that in the area south of Yonghe and Shu, it often rains and is rarely seen. The sun, as soon as the sun comes out, the dogs bark.

[Problem Design]

1. Use "comprehensive thinking" to analyze the reasons for "Southern Sichuan, constant rain and few days"?

Tip: The air in the Sichuan Basin is humid and the sky is cloudy; it is surrounded by mountains and the water vapor in the middle plain is not easy to disperse.

2. From the perspective of "geographical practicality", if you are a marketer of solar water heaters and only consider natural factors, will your market prospects be broad in Chengdu and Chongqing? Why?

Tip: The prospects are not promising. Because "Sichuan dog barking day" reflects to a certain extent the lack of solar energy resources in the areas where Chengdu and Chongqing are located.

[Training to pass the test]

1. The main driving force that maintains surface temperature and promotes water, atmospheric movement and life activities on the earth is ()

A. Gravitational energyB. Bioenergy

C． Wind energy D. solar energy

2. The agricultural proverb "Fish rely on water, babies rely on mothers, and all things grow dependent on the sun" reflects that solar radiation provides the earth with ()

A. Light, heat B. The driving force behind atmospheric movement and water circulation

C． Produce energy D. life energy

3. Regarding solar radiation, the incorrect statement is ()

A. Solar radiation means that the sun continuously radiates energy into the universe in the form of electromagnetic waves.

B． The sun provides light and heat to the earth

C． Most of the solar radiation reaches the earth and has an immeasurable impact on the earth

D． Solar radiation is the main driving force for water, atmospheric movement and life activities on the earth

PPT on the cosmic environment where the earth is located, part three: carrying out structural evaluation of thinking

Structural evaluation of thinking - the impact of solar radiation on the earth

Solar radiation refers to the sun radiating energy into the universe in the form of electromagnetic waves. Due to the "nearly neither far nor close" distance between the sun and the earth, the solar radiation received by the earth is one 2.2 billionth of the total radiant energy released by the sun into the universe. Although the solar radiation energy is unevenly distributed in space and time on the earth's surface, its impact is immeasurable. What are its main manifestations?

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Update Time: 2024-11-22

This template belongs to Geography courseware Compulsory Course 1 of High School Geography in China Graphics Edition industry PPT template

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