"Earth's Cosmic Environment" Earth in the Universe PPT courseware download

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"Earth's Cosmic Environment" Earth in the Universe PPT courseware download

Part One: Strengthening the Implementation of Basic Knowledge

[Self-reading textbook·Fill in key points]

1. Human understanding of the universe

1. Human understanding of the universe

(1)The process is long and ______.

(2) The accumulation of knowledge about the universe is ______.

2. meaning of universe

(1) The universe is the sum of all ______, ______ and matter, and is the ______ of our material world.

(2) Astronomers call the limited universe that humans have observed “______universe” or “______universe”.

(3)The radius of the visible universe is about ______ billion light years.

2. Multi-level celestial body system

1. Celestial bodies: ______, nebulae, ______, satellites and other materials in the universe are collectively called celestial bodies. The celestial bodies in the universe are ______.

2. Celestial body system: The moving celestial bodies form a celestial body system due to ______ and ______. Celestial systems have different ______.

3. Milky Way and Extragalactic Galaxies

(1) Composition: Mainly composed of relatively large celestial bodies such as ______.

(2) Minimum distance unit: ______.

(3) Milky Way: It is composed of a large number of ______ and nebulae.

(4) Extragalactic galaxy: a star system ______ with the Milky Way.

(5) Observable universe: including ______ and the ______ that can be observed at this stage.

4． Solar System and Earth-Moon System

(1)Solar system:

①Concept: It consists of the sun, ______, dwarf planets and ______, as well as small celestial bodies such as ______, comets, meteoroids and interplanetary matter.

②Sun: The sun is ______, and its mass accounts for about 99.86% of the mass of the entire solar system.

(2) Earth-moon system:

①Concept: The celestial system composed of the earth and its satellite ______.

②Moon: The direction and period of the moon's revolution and rotation are exactly the same, with one side always facing the earth; the moon itself does not emit visible light and reflects ______.

(3) Mars, Jupiter, Saturn, Uranus, Neptune and their respective satellites form a celestial system similar to ______.

3. Special Planet—Earth

1. There is the only advanced intelligent life——______.

2. basic conditions for the existence of life

(1) Adequate moisture.

(2) Just the right atmosphere ______ and atmosphere ______.

(3) Suitable sunlight and ______ range, etc.

Earth’s cosmic environment PPT, part 2: Pay attention to problem-based teaching

Question 1: How to accurately identify celestial bodies and celestial body systemsBasic test points

Research point (1) Determination of celestial bodies

[Thinking and exploring]

[Explore] In the above two pictures, the celestial body is ____________. What is the basis for judgment?

Tip: The "Shenzhou 11" flying around the earth is independent of the outside of the atmosphere and is a celestial body; the meteor shower is a luminous phenomenon caused by meteors entering the atmosphere and friction with the atmosphere, and is not a celestial body.

Research point (2) Levels of celestial systems and their determination

[Thinking and exploring]

The sun is big, the earth is small, and the earth runs around the sun; the earth is big, the moon is small, and the moon runs around the earth.

[Explore] How many levels of celestial body systems are reflected in the materials? What are the differences?

Tip: Two levels. Solar system and Earth-Moon system.

[System Cognition]

1. Judgment of celestial systems

In order for celestial bodies to form a celestial body system, two conditions must be met at the same time, namely the "two requirements": first, they must attract each other, and second, they must revolve around each other. Only attraction without rotation cannot constitute a celestial system. For example, the moon orbits the earth and forms the earth-moon system. However, if the stars of the Big Dipper do not revolve around each other, they cannot form a celestial system.

2. composition of solar system

(1) Taking the orbit of the Earth as the boundary, Mercury and Venus are often called inner planets, and Mars, Jupiter, Saturn, Uranus and Neptune are called extraterrestrial planets.

(2) Jupiter and Saturn rank first and second in size and mass respectively, and are called giant planets.

(3) Uranus and Neptune are far away from the sun and are called aphelion planets.

[Training to pass the test]

"Twinkle and twinkle, the sky is full of little stars, hanging in the sky and shining brightly, like many little eyes..." is a nursery rhyme that everyone is familiar with. Answer questions 1-2 accordingly.

1. Most of the stars mentioned in nursery rhymes belong to ()

A. Planet b. star

C. Meteor D. nebula

2. Which of the following are the types of celestial bodies mentioned in the above question ()

A. sun b. Moon

C. Jupiter D. meteorite

Analysis: Question 1: Stars are spherical or spherical celestial bodies that can emit their own light. Planets usually refer to celestial bodies that do not emit their own light and surround stars. Nebulae are cloud-like celestial bodies composed of gas and dust. Meteors refer to cosmic dust or solid matter. The light traces produced by the friction and burning of space materials such as blocks and the atmosphere, so the small stars in the sky can only be stars. Question 2, the only celestial body in the options that is a star is the sun, the moon is a satellite, Jupiter is a planet, and meteorites are not celestial bodies.

Question 2: What are the basic conditions for the existence of life on earthDifficult test points

[Thinking and exploring]

In 2015, NASA's research team gave us a better understanding of Mars: In July, it was discovered that there are hydrated salts on Mars, confirming the existence of liquid water on Mars, and liquid water is the key to the existence of life. In October, it was discovered that there may have been a lake that lasted for tens of thousands of years before Mars. In November, the Martian atmosphere blown away by the solar wind was discovered.

[Problem Design]

1. Use "comprehensive thinking" to analyze whether life may exist on Mars? Why?

Hint: Possibly. Because there is liquid water on Mars, liquid water is key evidence for the existence of life.

Or impossible. Because what was found was hydrated salts, not real liquid water. At the same time, there were no atmospheric conditions suitable for biological breathing, and the temperature was relatively low.

2. From the perspective of "geographical practicality", let's explore what external conditions the planet should have if extraterrestrial civilization exists?

Tips: Safe cosmic environment and stable lighting.

Earth’s cosmic environment PPT, part 3: Carry out structural evaluation of thinking

Structural evaluation of thinking—humanity’s exploration of extraterrestrial civilizations

With the continuous advancement and development of human science and technology, humans have stepped out of the earth and begun to explore the vast universe. They are also doing their best to find a "second earth" suitable for human habitation. During this process, scientists have been focusing their research on the exploration of Mars. Why is this?

Keywords: Hunan Education Edition high school geography compulsory course 1 PPT courseware free download, Earth’s cosmic environment PPT download, Earth in the universe PPT download, .PPT format;

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

"Earth's Cosmic Environment" Earth in the Universe PPT free courseware:

"Earth's Cosmic Environment" Earth in the Universe PPT free courseware Part 1: Basic review 1. Human understanding of the universe 1. Universe: The sum of all _________, _________, and matter. 2. Observable Universe: The limited space that humans have observed...

"Earth's Cosmic Environment" Earth in the Universe PPT teaching courseware:

"Earth's Cosmic Environment" The Earth in the Universe PPT teaching courseware Part 1: Strong foundation, independent diagnosis, basic literacy 1. Human understanding of the universe 1. The meaning of the universe: It is the sum of all ________, space and _________, it is our ___..

"The Evolution of the Earth" Earth in the Universe PPT courseware:

"The Evolution of the Earth" Earth in the Universe PPT courseware Part 1: Basic review 1. Primitive atmosphere, oceans and land 1. Age of Earth: Approximately __________ years. 2. The formation of land: At the beginning of the birth of the earth, it was constantly hit by meteorites, which caused...

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Update Time: 2024-08-29

This template belongs to Geography courseware Hunan Education Edition High School Geography Compulsory Course I industry PPT template

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