Fifth Grade Science Volume 1, Textbook Edition
Science Edition for Sixth Grade Science Volume 2
Science Edition for Sixth Grade Science Volume 1
Third Grade Science Volume 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
Third Grade Science Volume 1, Textbook Edition
Fourth Grade Science Volume 2, Textbook Edition
Fourth-grade science volume 2 of the E-education edition
Qingdao Edition Fourth Grade Science Volume 2
Hunan Education Edition Fourth Grade Science Volume 1
E-education edition fifth grade science volume 1
E-education edition fifth grade science volume 2
Fifth Grade Science Volume 2, Textbook Edition
E-education edition sixth grade science volume 1
Zhejiang Education Edition Seventh Grade Science Volume 2
People's Education Press Fourth Grade Science Volume 2
Category | Format | Size |
---|---|---|
Qingdao Edition Third Grade Science Volume 2 | pptx | 6 MB |
Description
Qingdao edition third grade science volume 2, Earth's atmosphere PPT
Part One: The atmosphere is all around us
We can feel the presence of the atmosphere at any time, such as: people breathe the air;
Phenomena such as clouds and rain constantly occur in the atmosphere;
Planes fly through the atmosphere;
Birds fly in the atmosphere...
Earth's atmosphere PPT, part 2: atmosphere
1. There is an atmosphere on the surface of the earth
The earth is surrounded by a very thick layer of air. The air layer surrounding the earth is called the atmosphere, and the air is also called the atmosphere.
The atmosphere is mainly concentrated at a height of about 1,000 kilometers above the ground.
The atmosphere appears very thin compared to the radius of the Earth.
2. Composition of the atmosphere
Nitrogen, oxygen, carbon dioxide, rare gases, ozone, water vapor and solid impurities suspended in it.
The role of the three atmospheres: 3.1
1. Various gases in the atmosphere are indispensable resources (provide resources) for human beings (for example: oxygen is necessary for life activities; carbon dioxide is an important raw material for photosynthesis)
2. Water vapor and dust can form clouds and cause rain, causing various weather changes.
3. Insulation to reduce the temperature difference between day and night
4. The ozone layer can protect living things on the ground from the sun’s ultraviolet rays.
5. Protect the earth, such as avoiding meteor attacks
Earth's atmosphere PPT, the third part: look at the pictures and learn the text
Talk about it
(1) What do the vertical and horizontal axes in the figure represent?
(2) What is the change pattern of temperature as altitude increases?
Temperature increases with altitude
Temperature decreases with increasing altitude
Temperature increases with altitude
Temperature decreases with increasing altitude
Why do we need to keep warm when going hiking?
Living in the area of 0-12 kilometers, the atmospheric temperature only decreases with increasing height. When climbing, the higher a person climbs, the lower the atmospheric temperature.
What about altitude sickness?
High altitude, thin air, lack of oxygen
Earth's atmosphere PPT, part 4 content: The importance of the atmosphere:
1. Protect the earth from meteorite collisions and reduce the temperature difference between day and night.
2. Various gases in the atmosphere are indispensable resources for human beings
3. The ozone layer can protect living things on the ground from the sun’s ultraviolet rays.
4. Water vapor can form clouds and cause rain, causing various weather phenomena.
5. It is the medium for sound transmission
In short: the atmosphere is very important to humans, protecting the earth like a "coat". Without the atmosphere there would be no life, and there are many beautiful scenery we would not be able to see.
Earth's atmosphere PPT, Part 5: Atmospheric pollution
With the rapid development of human society's production and life, various pollutants have entered the earth's atmosphere in large quantities. This is what people call "air pollution."
Car exhaust - the exhaust gas emitted by cars is the main killer of the atmosphere
Discussion: How to prevent and control air pollution?
1. Carry out reasonable industrial layout;
2. Improve combustion equipment;
3. Improve the structural composition of fuel;
4. Treat pollutants in exhaust gas;
5. Plant trees.
The destruction of the ozone layer is the most serious form of air pollution, and it is also one of the focuses of concern for environmental workers. What are your thoughts on this hot topic?
Keywords: Qingdao version third grade science PPT courseware for the second volume free download, Earth’s atmosphere PPT download, .PPT format;
For more information about the "Earth's Atmosphere" PPT courseware, please click on the Earth's Atmosphere ppt tag.
File Info
Update Time: 2024-11-17
This template belongs to science courseware Qingdao Edition Third Grade Science Volume 2 industry PPT template
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