"Crustal Movements and Volcanic Earthquakes" PPT courseware

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"Crustal Movements and Volcanic Earthquakes" PPT courseware

Part One: The Legend of the Formation of the Himalayas

There is a Tibetan legend about the formation of the Himalayas: A long time ago, there was an endless sea with a forest on the shore, where birds and animals lived carefree. One day, a huge five-headed poisonous dragon suddenly appeared in the sea and caused a mess in the forest. Just when the birds and beasts were desperate, five colorful clouds floated over the sea and turned into five wisdom dakinis. They came to the seaside, used their magic power, and subdued the five poisonous dragons. Wisdom Dakini wanted to say goodbye and return to heaven, but sentient beings begged and asked them to stay here for the benefit of sentient beings. So the five fairies showed compassion and agreed to stay and share the day of peace with all living beings. The five fairies ordered the sea to recede, so the east became a dense forest, the west was vast fields, the south was a garden with lush flowers and grass, and the north was an endless pasture. Those five fairies became the five main peaks of the Himalayas, standing on the southwest edge, guarding this happy paradise. The leader, Everest, is the highest peak in the world today, and local people affectionately call it the "Goddess Peak." Scientific surveys and discoveries have proven that the Tibetan Plateau was originally a vast ocean. It took millions of years of crustal changes to cause the uplift to rise sharply. Measurements on Mount Everest, the main peak of the Himalayas, prove that the plateau is still rising at a rate of one to two centimeters per year.

Crustal changes and volcanoes and earthquakes PPT, Part 2: The structure of the earth’s interior

①Core ②Inner core ③Crust ④Mantle ⑤Outer core

2. Proof of crustal changes

Take a book and lay it flat on the table, then hold both ends and press hard towards the middle to bend the book and try to draw it. Compete to see who is the fastest and best!

Crustal changes and volcanoes and earthquakes PPT, part three content: Discussion:

1. Based on the above phenomena of crustal changes, where does the huge energy causing the crustal changes mainly come from?

2. Do you know what other phenomena can prove that the earth’s crust is constantly changing?

Crustal changes and volcanoes and earthquakes PPT, part 4: test you

1. Name the internal structure of the earth: _____, _____, _____.

And name their respective ranges: Earth’s crust: 0~17 kilometers

Mantle: 17~2900 km Core: 2900~6371 km

2. What does the rise and fall of the three marble columns on the coast of Naples, Italy, mean:

3. Some changes in the earth's crust are very _____, some are very _____, and some are very _____.

4. Regarding the statement about the lithosphere, which one is correct ( )

A. The lithosphere is a part of the earth’s crust

B. The lithosphere is part of the earth’s mantle

C. The lithosphere refers to the earth’s crust

D. The lithosphere is composed of parts of the earth’s crust and mantle

Keywords: Zhejiang Education Edition seventh grade science PPT courseware free download, crustal changes and volcanic earthquakes PPT download, .PPT format;

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"Crustal Movements and Volcanic Earthquakes" PPT:

"Crustal Movements and Volcanoes and Earthquakes" PPT Part 1 Content: Please guess what the possible reason is? Qinghai-Tibet Plateau A traveler who was trekking on the Qinghai-Tibet Plateau picked up a small stone from the rock formations on the roadside while resting and admired it. He was struck by the lines on the small stone...

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Update Time: 2024-11-22

This template belongs to science courseware Zhejiang Education Edition Seventh Grade Science Volume 1 industry PPT template

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