"The Sun and the Moon" PPT courseware

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"The Sun and the Moon" PPT courseware

Part 1: Some data about the sun

1. The diameter of the sun is about _______ kilometers

2. Surface temperature is about _____°C

3. The core temperature is as high as ______°C

4. The average distance between the sun and the earth is _____ kilometers

5. The mass of the sun accounts for _______ of the entire solar system, which is ____ times that of the earth, and its volume is 1.3 million times that of the earth.

6. The main reason why the sun becomes the central object of the solar system is ____________________

Sun and Moon PPT, Part 2 Content: Thoughts and Discussions:

1. Light travels 300,000 kilometers per second. How many minutes does it take for sunlight to reach the earth?

2. Which morphological characteristics of plants are closely related to sunlight?

(1) Phototropism of plants (2) Photosynthesis of plants (3) Leaf mosaic phenomenon (4) The front side of the leaves is darker than the back side (5) The leaves are lush on the sunny side of the plant

For example, the leaves of plants are large to increase the absorption of sunlight; some plants have waxy layers on the surface of their leaves to increase the reflection of sunlight and reduce water evaporation; sunflowers have phototaxis to increase the absorption of sunlight, etc.

Sun and Moon PPT, Part 3: The Impact of Solar Activity on the Earth

A. Disturbing the ionosphere above the earth and affecting terrestrial short-wave radio communications

B. Magnetic storms occur, causing the magnetic needle to vibrate violently and unable to indicate the correct direction.

C.Auroras are formed over the Earth’s polar regions

D. Affects the climate, hydrology, geology and human life on the earth, and indirectly affects various disasters on the earth, such as floods and droughts.

E. Endangering interstellar navigation

Sun and Moon PPT, Part 4: Overview of the Moon:

(1) The moon itself ______, and the moon seen is the lunar surface illuminated by ______.

(2)The moon is the only ______ on the earth.

(3) Distance from the Earth: The average distance is about _______ kilometers,

It is approximately _________ the distance between the sun and the earth.

(4) Diameter: The diameter of the moon is about ________ kilometers,

It is approximately __________ the diameter of the sun.

(5) Volume and mass: The size of the moon is very small, about ____ of the earth.

The mass is only ______ of the Earth.

Sun and Moon PPT, Part 5: Think about it:

Why are there so many more craters on the side of the moon facing away from the Earth than on the side facing the Earth?

1. Earth’s obstruction 2. Earth’s gravity is greater than that of the moon

lunar landscape

1. Objects on the lunar surface will become very light.

2. The temperature difference between day and night on the moon’s surface reaches 300℃

3. No sound can be heard on the moon.

4. The surface of the moon is covered with large and small rock craters - craters.

Sun and Moon PPT, Part 6: Practice Questions

1. Sunspots occur on the ____ layer?

A. Photosphere

B. Chromosphere

C. Coronal layer

2. The reason why sunspots are dark is ____?

A. It is black

B. Its temperature is higher than the surrounding temperature

C. Its temperature is lower than the surrounding temperature

3. The intensity of sunspot activity changes over a period of ____ years?

A. 11 years B. 22 years C. 33 years

4.The nearest star to us is []

A. Moon B. Venus

C. Sun D. Polaris

Keywords: Zhejiang Education Edition seventh grade science PPT courseware for the second volume free download, Sun and Moon PPT download, .PPT format;

For more information about the "Sun and Moon" PPT courseware, please click on the "Sun and Moon PPT" tab.

"The Sun and the Moon" PPT download:

"Sun and Moon" PPT Download Part One Content: Introduction to the Moon The diameter of the moon is about 3476 kilometers, which is about 1/4 of the diameter of the earth. The volume of the moon is about 1/49 of the earth. It is about 1/400 of the diameter of the sun. The mass of the moon is about 1/81 of the Earth. Why is the Moon larger than the Sun?

"The Sun and the Moon" PPT:

"The Sun and the Moon" PPT Part One: Learning Objectives 1. Understand the size of the sun...

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Update Time: 2024-10-17

This template belongs to science courseware Zhejiang Education Edition Seventh Grade Science Volume 2 industry PPT template

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