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Shanghai Education Edition Geography for Sixth Graders Volume 2	pptx	6 MB

"Earth Overview" PPT courseware

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Upload Time: 2024-11-16

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Description

"Earth Overview" PPT courseware

Part One Content: Learning Objectives:

shape of earth

size of earth

Earth's sphere

Earth Overview PPT, Part 2: Shape and Size of the Earth

1. Ancient people’s conjectures about the shape of the earth

Ancient Chinese believed that the sky was round and the earth was square.

Ancient Indian view of the earth

Ancient Indians believed that the earth was a round shield carried by three elephants, standing on the back of a tortoise, and the tortoise was straddling a cobra.

Ancient humans’ understanding of the shape of the earth also included:

The ancient Babylonians believed that the universe was a closed box and the earth was the floor of the box.

The ancient Hebrews believed that the earth was a flat plate.

The ancient Greeks believed that the earth was a round shield surrounded by an oceanic river.

Ancient Russians believed that the earth was a round shield carried by three whales.

2. Shape of the Earth

Is the earth a perfect sphere?

An irregular sphere that is slightly flattened at the poles and slightly bulging at the equator.

What other facts prove that the earth is spherical?

The hull of the sailing ship disappears before the mast

3. The size of the earth

Average radius: 6371km

Maximum circumference: about 40,000 kilometers

Earth overview PPT, the third part: Earth’s spheres

1. The internal structure of the earth

crust mantle core

2. Earth’s outer sphere

Do you know about the world beyond the earth?

Earth's position in the universe

Earth's position in the solar system

While the earth rotates, it also revolves around the sun.

Keywords: Shanghai Education Edition Geography PPT courseware for sixth grade volume 2 free download, Earth overview PPT download, .PPT format;

For more information about the "Earth Overview" PPT courseware, please click the Earth Overview ppt tab.

"Earth Overview" PPT:

"Earth Overview" PPT Part One Content: Learning Objectives Knowledge Objectives: Understand that the Earth is an ordinary planet in the universe and is the home of mankind. Master the shape and size of the earth...

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Update Time: 2024-11-16

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"Earth Overview" PPT courseware