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

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

Part One: Craters on the Moon

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, the second part of the content: Build a "crater"

Compare the shapes of craters, craters, and craters.

Let's simulate making some "craters".

How to build a "crater"?

How many ways do you have to "build a mountain"?

Which methods are more in line with the actual conditions of the moon?

water spray method

Experimental steps:

1. Connect the syringe to the hose and insert the hose into the bottom of the sand.

2. Push out the water in the syringe and observe the phenomenon.

Pay attention to observe:

How will the size of the ejection port and the amount of ejecta affect the crater?

impact method

Experimental steps:

Prepare stones of different sizes and a sand tray, and then throw the stones into the sand tray.

Pay attention to observe:

What impact will the size of the impact ball and the speed of the impact have on the crater?

What discoveries were made during the process of building the "crater"? Can you use a diagram to show the formation process of the "crater"?

The jet vent is relatively large, and the diameter of the crater is relatively large,

The vents are relatively small and the diameter of the crater is relatively small.

The more ejecta there is, the larger the diameter of the crater will be.

There is less ejecta and the diameter of the crater is relatively small.

Let’s create a crater PPT. Part 3: Speculating on the origin of craters.

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

Craters are randomly distributed

Various sizes and shades

Theories 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 so many 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 never had frequent and intense volcanic activities.

What evidence do scientists use when formulating hypotheses?

Do you need to revise your assumptions? If necessary, what are the main modifications?

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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 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. ..

"Let's Build a Crater" Universe PPT:

"Let's Build a Crater" Universe PPT Part 1: 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 lunar landforms...

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Update Time: 2024-07-30

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

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