"The Shape and Size of the Earth" PPT courseware

Description

"The Shape and Size of the Earth" PPT courseware

Part One: The Shape of the Earth

What is the shape of the earth?

Many phenomena show that the earth is not as flat as intuitively. People imagine that the earth has been turned into an upside-down plate, and the sky is like a semicircular bamboo hat. This is "the sky is round like a cover, and the place is like a chess game."

From 1519 to 1522, Magellan's fleet circumnavigated the Earth for the first time, proving that the Earth is a sphere.

The dispute between "flat ground" and "long ground"

Religious theory: The earth is a perfect sphere.

British Newton: A sphere "slightly flattened at the poles and slightly bulging at the equator".

Cassini, France: "Elongated sphere extending along the poles."

The Shape and Size of the Earth PPT, Part 2: Classroom Exercises

1. The first event that confirmed that the earth is a sphere was ( )

A. Soviet Union Gagarin flew into space

B. Magellan’s voyage around the world

C. Aristotle’s speculation

D. The "Supreme Sky Theory" in ancient my country's theory of cosmic structure

2. The statement that cannot explain the shape of the earth is ( )

A. Photos of the Earth taken by artificial satellites

B. The shadow on the moon during a lunar eclipse

C. The ancient theory of a round sky and a square place

D. Magellan’s fleet’s experience of exploring the world

3. Regarding the shape and size of the Earth, which of the following statements is correct ( )

A. The earth is a sphere with a radius of about 6371 kilometers.

B. The earth has four directions: southeast, northwest, and southeast, so the earth is square.

C. The earth is too big, so its shape is unknown

D. The earth is a sphere with an average radius of about 6371 kilometers.

4. Which of the following statements about the earth is correct ( )

A. Only with satellites did humans realize that the earth is a sphere.

B. The first person to see with his own eyes that the earth is a sphere was Soviet astronaut Gagarin.

C. The earth is a regular sphere

D. The earth is a sphere that is slightly flat at the poles and slightly bulging at the equator.

The shape and size of the earth PPT, the third part: summary

Humanity's understanding of the earth is a result of long-term exploration and multi-faceted research. Students must dare to assume and explore in daily life, and use practice to understand the truth. We should think frequently, experience often, pay attention to observing geographical phenomena in life, and develop the habit of thinking and observation.

Operation

1. Draw an earth by yourself.

2. Record the earth’s radius, polar radius, equatorial length, earth’s surface area and other relevant knowledge points.

3. Complete the corresponding exercises in synchronous tutorials.

Keywords: Business Planet Edition seventh grade geography PPT courseware free download, Shape and Size of the Earth PPT download, .PPT format;

For more information about the "Shape and Size of the Earth" PPT courseware, please click on the "Shape and Size of the Earth" ppt tag.

"The Shape and Size of the Earth" PPT courseware download:

"The Shape and Size of the Earth" PPT courseware download

Part One Content: Learning a New Lesson

1. Introduction of new courses

The shape of the earth, as the name suggests, is "ball" shaped.

However, the understanding of the "spherical" shape has gone through a rather long process...

"The Shape and Size of the Earth" PPT download:

"The Shape and Size of the Earth" PPT download

Part One: The Shape of the Earth

1. The earth is a sphere

2. The process of human understanding of the shape of the earth

The ancient Chinese theory of "a round sky and a square earth"

Aristotle speculated:

According to the lunar eclipse...

"The Shape and Size of the Earth" PPT:

"Shape and Size of the Earth" PPT

Part One: The Shape of the Earth

One of the ideas of the ancients: the sky is round and the earth is round

What examples in life can prove that the ancients' views were wrong?

Evidence 1. The shadow of the Earth on the moon during a lunar eclipse

Gu Xi...

File Info

Update Time: 2024-08-21

This template belongs to Geography courseware Business Planet Edition 7th Grade Geography Volume 1 industry PPT template

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