"Let's Build a Crater" Universe PPT

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"Let's Build a Crater" Universe PPT

Part One: Review of the previous section

1. What are moon phases?

2. What are the patterns of moon phase changes in the first half of the month and the second half of the month?

3. What are the moon phases of each month called?

4. What is the reason for the change of moon phases?

The biggest feature of the lunar landscape is that there are many large and small craters. Most of the craters are circular, some are single, some are stacked together, and some are large rings within small rings. Some craters are less than one thousand meters in diameter, while others can reach hundreds of kilometers in diameter.

Let’s build a crater PPT, part 2: main features of craters

1. Distribution is messy and random

2. A large number

3. Different sizes

4. Different shades

What speculations do you have about how the craters on the moon were formed? What is the basis?

Let’s build a crater PPT, the third part: the theory about the causes of crater formation

There have been many speculations about the formation of craters on the moon. The currently accepted view is the "impact theory". This view believes that the numerous craters are the traces left behind after long-term meteor and meteorite impacts on the moon. Because there is no air on the moon, it is equivalent to missing a layer of protection, making impacts more violent and frequent. People have observed such "craters" on the surfaces of some planets and many moons and asteroids, confirming this conjecture.

Some people have also believed that craters on the moon may have been formed by volcanic eruptions. However, according to the detection data of the "moonseismometer" installed on the moon after humans landed on the moon, it is known that compared with the earth, the moon is a geologically inactive celestial body. In the past 4.6 billion years, the moon has not experienced frequent and intense volcanic activities.

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For more information about the PPT courseware "We will build craters from the universe", please click the "We will build craters from the universe" ppt tag.

"Let's build a "crater"" universe PPT teaching courseware:

"Let's Build Craters" Universe PPT Teaching Courseware Part One: Craters on the Moon The biggest feature of the lunar landscape is the distribution of many large and small craters. Most of the craters are round, some are single, some are stacked together, and some are large...

"Let's build a "crater"" universe PPT download:

"Let's Build Craters" Universe PPT Download Part One: Introduction to New Lesson This is a picture of the moon taken by an astronaut at close range. What can you observe from it? 1. Many circular pits 2. Some are single, and some are several crowded together. ..

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Update Time: 2024-10-05

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

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