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 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
Third Grade Science Volume 1, 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 Fifth Grade Science Volume 2
Category | Format | Size |
---|---|---|
Qingdao Edition Fourth Grade Science Volume 1 | pptx | 6 MB |
Description
"What's inside the Earth" PPT
Part One: Exploring the Earth
Exploration: What’s inside the Earth?
Human exploration of the Earth’s interior
It is about 6,400 kilometers from the ground to the center of the earth, and the most advanced drilling rigs can only drill to a depth of more than a dozen kilometers. If the earth is compared to an apple, it is equivalent to not even drilling through the skin.
How can we know what’s going on inside the earth?
Seismic waves can propagate in all directions, and some can reach all the way to the center of the earth. When seismic waves encounter different materials during propagation, they will be reflected and refracted differently. By recording this information with instruments, and then conducting analysis and research, you can know the state and distribution of underground materials.
Scientists use information provided by seismic waves, magnetism, etc. to explore and study the internal conditions of the earth.
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"What's Inside the Earth" PPT courseware download:
"What's Inside the Earth" PPT courseware download Part One: Earth's Self-Report I am the third planet in the solar system from the inside to the outside, and also the terrestrial planet with the largest diameter, mass and density in the solar system. It is also often called the world. English word for me Earth..
"What's inside the Earth" PPT download:
"What's inside the Earth" PPT download Part One: Describing the composition of the Earth's interior The Earth can be seen as composed of a series of concentric layers. Inside the Earth, there are core, mantle, and shell structures. Outside the earth, there are hydrosphere, atmosphere, and magnetosphere, which form a...
"What's inside the Earth" PPT courseware:
"What's inside the Earth" PPT courseware Part One: Inside the Earth So do you want to know what's inside the Earth? Let’s use pictures to guess what’s inside the earth? Earth's core: the core part, 3,400 kilometers thick, with a temperature of about 4,700°C. Earth's crust: made of solid...
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Update Time: 2024-11-21
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