"Earth's Cosmic Environment" Looking at the Earth from the Universe PPT courseware (Lesson 1: The Universe Sun)

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"Earth's Cosmic Environment" Looking at the Earth from the Universe PPT courseware (Lesson 1: The Universe Sun)

Part One: Explanation of Curriculum Standards

1. Understand different types of celestial bodies and their characteristics, understand the levels of celestial body systems, and be able to describe the earth's position in the universe. (comprehensive thinking)

2. Memorize the positions of the members of the solar system and use data to understand the motion characteristics of planets orbiting the sun. (Comprehensive practical ability)

Earth’s cosmic environment PPT, part 2: independent preview

1. Universe

1. Concept: The universe is a unity of time and space, which is moving, developing and changing.

material world.

2.Characteristics

(1)Materiality

① Celestial body concept: various substances in the universe.

②Celestial body types: Various types, such as nebulae, stars, planets, satellites, comets, meteoroids, interstellar matter, etc. Among them, stars and nebulae are the most basic celestial objects.

(2)Mobility

①The formation of celestial body systems: Celestial bodies attract and revolve around each other, forming celestial body systems of different levels.

②Level of celestial system:

3. Infinity: The scope of the universe that humans understand is constantly expanding, and has currently expanded to 13.7 billion light-years.

Think about whether the "Shenzhou 10" spacecraft operating in space is a celestial body? Why? What about the landing return capsule?

Tip: Celestial bodies are a variety of substances in the universe. To judge whether an object is a celestial body, first look at the essence: whether it is a substance in the universe. Some natural phenomena do not belong to celestial bodies; secondly, look at the existence: whether it exists independently in the universe. In space, if it exists attached to other objects, such as white clouds on the earth and satellites to be launched, they are not celestial bodies.

Answer: The "Shenzhou 10" spacecraft operating in space is a celestial body, but the landing capsule is not a celestial body.

2. The sun

1.Solar system

(1) The sun is the central object of the solar system, and its mass accounts for 99.86% of the mass of the solar system.

(2) The order from nearest to far from the sun is: a Mercury, b Venus, c Earth, d Mars, e Jupiter, f Saturn, g Uranus, h Neptune.

2.Solar radiation

(1) Energy source: nuclear fusion reaction of core material.

(2)Influence

3. Solar activity

(1) Concept: The solar atmosphere changes frequently, sometimes violently. These changes are collectively called solar activities.

(2)Distribution

(3) Important signs: sunspots and flares.

(4) Cycle: approximately 11 years.

(5)Influence

Think about it, how do you understand that the coal and oil used in production and daily life are fixed solar energy?

Tip: Coal and petroleum were formed after a long period of geological processes when a large number of animal and plant remains were buried underground during geological history. In other words, they are solar energy fixed by animals and plants.

Earth’s cosmic environment PPT, part three: self-test

1. True or False Question

(1) The "Tiangong-2" operating in space is a celestial body. ()

(2) The observable universe is the universe. ()

(3) The solar atmosphere is composed of photosphere, chromosphere and corona from the inside to the outside. ()

(4) Flares are solar activities that appear on the photosphere. ()

(5) The energy source of solar radiation is its own nuclear fission reaction. ()

Answer: (1)√ (2)× (3)√ (4)× (5)×

2. Which of the objects in the picture below is a celestial body ()

Analysis: It can be seen from the picture that A is the aircraft, B is the space shuttle on the launcher, and C is the return capsule of the spacecraft returning to the ground. None of the three have separated from the earth and are part of the earth. D is a space station operating in space and is an artificial celestial body.

Answer:D

3. 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 and heat resources

B. The driving force behind atmospheric movement and water circulation

C. Produce energy

D.Life energy

Analysis: "Growth of all things" mainly refers to agricultural production. The growth of crops must use solar radiation for photosynthesis, so choose A.

Answer:A

Earth’s cosmic environment PPT, part 4 content: classroom exploration

Exploration 1

The impact of solar activity on the earth

Question exploration

Material 1: Scientists point out that solar storms often affect the earth, causing a large amount of radiation, and causing interference to satellites, power grids, radios and wireless communications. Solar storms are extremely high-speed streams of charged particles ejected from a star's upper atmosphere.

Material 2 According to statistics, since the beginning of complete records of sunspot activity, humans have been hit by 12 global influenza pandemics. Except for one, the other 11 episodes all occurred during the peak years of solar activity or 1 to 2 years before and after. During the peak period of sunspot activity, the number of deaths due to myocardial infarction increases suddenly. Especially on the first day after the solar flare, there is a sharp increase in cardiovascular and cerebrovascular patients or sudden death. Therefore, some people call this day the cardiovascular and cerebrovascular day. A patient’s “danger day.” American scientists have found that the peak incidence of skin cancer often occurs in the second year after the peak of solar activity.

Explore with materials:

(1) How to understand the phenomenon produced by material one?

(2) How does Material 2 reflect the impact of solar activity on humans?

(3) How should we view the relationship between human diseases and solar activity?

Tips: (1) Solar activity will interfere with radio shortwave communications, so it has a direct impact on aerospace and communications.

(2) Sunspots and flares have an impact on human life and health.

(3) Solar activity is only a minor factor among multiple triggering factors.

Lectures by famous teachers

The impact of solar activity on the earth

(1)The impact of solar radiation on the earth

(2) Solar activity and the earth

Analysis of typical cases

Example 1 NASA observed a flare explosion from a red dwarf star (star) not far from the solar system. The energy it released was equivalent to the sum of the energy released by thousands of solar flares, which would blow away the planet's atmosphere. Complete the following questions accordingly.

(1) When this star flares out ()

A. It is a dark spot

B. is a brightened patch

C. It will definitely disturb the earth’s atmosphere and cause wireless communication interruption.

D. It will definitely cause abnormal climate on the earth

(2) When the stream of charged particles generated by this flare reaches a nearby planet, the following phenomena may occur on the planet: ()

①The atmosphere is blown away and the surface becomes a barren land; ②The surface temperature will definitely increase; ③Aurora will appear everywhere on the planet; ④"Magnetic storm" phenomenon may occur on the planet

A.①② B.③④ C.②③ D.①④

Literacy intention: This question examines the relevant characteristics of flares in solar activity.

Analysis: Question (1): A flare is a brightened patch that may have an impact on the earth, but does not necessarily cause wireless communication interruptions and climate abnormalities. Question (2): Aurora only appears in the polar regions of the planet; the flare explosion of the red dwarf star will blow away the planet's atmosphere and increase the temperature difference between day and night on its surface.

Answer:(1)B　(2)D

Earth’s cosmic environment PPT, part 5: In-class inspection

1. Among the following objects, which one is a celestial body ()

① The sun, the moon, the Big Dipper ② Stars, satellites, planets, comets ③ Trains, ships, huge rocks ④ Rockets to be launched, spacecraft to be launched

A.①② B.③④

C.①③ D.②④

Analysis: Trains, ships, huge rocks, rockets to be launched, and spaceships to be launched are all appendages of the earth and are not celestial bodies.

Answer:A

2. The large, medium and small circles in the following figures represent the extragalactic galaxy, the solar system, and the Earth-Moon system respectively. Among them, the one that can correctly represent the relationship between the three is ()

Analysis: The Earth-Moon system belongs to the solar system, and there is no affiliation between the solar system and extragalactic galaxies.

Answer:B

The figure below illustrates the spatial distribution of winter and summer sunshine hours in a certain region of my country. Read the picture and complete questions 3~4.

3. The main factors leading to the difference in sunshine hours between winter and summer in the western part of the region are ()

A. Sun altitude

B.Weather conditions

C. length of day and night

D.Altitude

4. Based on the information in the picture, judge the following four

The best place to build a solar power station in the ground

of is()

A.① B.②

C.③ D.④

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For more information about the PPT courseware "Earth's Cosmic Environment Viewing the Earth, Universe and Sun from the Universe", please click the Earth's Cosmic Environment ppt Viewing the Earth from the Universe ppt Universe and Sun ppt tag.

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Update Time: 2024-07-04

This template belongs to Geography courseware Lu Ke version of high school geography compulsory course I industry PPT template

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