"The Movement of the Earth" Earth and Map PPT Courseware 8

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"The Movement of the Earth" Earth and Map PPT Courseware 8

Is it a turn of events? Or is it georotation?

Just as the earth is a sphere, it is an unquestionable truth for modern people that the earth is constantly rotating. But if you are asked to prove this, it may not be a simple matter.

Geocentric

In ancient times, people believed that the earth was stationary based on their intuitive feelings. The sun, moon and stars rose in the east and set in the west because they were rotating around the earth. In the 4th century BC, the ancient Greek philosopher Aristotle proposed that the entire universe is a multi-layered crystal ball, with the earth at the center of the crystal ball, and the stars, planets, sun and moon all rotating around the earth in their own orbits. This is the earliest geocentric theory in history. In the 2nd century AD, the famous Greek astronomer Ptolemy made a systematic summary and improvement based on Aristotle and others, and further improved the geocentric theory. Due to the popularity of Aristotle and Ptolemy, and the fact that this theory catered to the later religious thoughts of the Holy See, the geocentric theory dominated Europe for more than 1,000 years.

The direction and period of the Earth's rotation

The Earth rotates every day, from west to east

Viewed from above the North Pole, the Earth rotates counterclockwise

Viewed from above Antarctica, the Earth rotates clockwise

Earth's revolution

Observe the Earth’s revolution and think about the following questions:

1.What is the direction of the Earth’s revolution? Is it the same as the direction of rotation?

2. When the earth rotates, what is the direction of the earth's axis? Is the Earth's axis upright or tilted?

3. How does the position of the sun hitting the earth's surface change?

Thinking: Compared with the three periods of the same day, morning, noon and evening, at which time do we feel the sun is the most exposed?

The greater the angle at which the sun's rays hit the ground, the more solar ray energy the ground receives; vice versa.

Sun height: The angle at which the sun's rays hit the ground.

Direct sunlight: The angle between the sun's rays and the ground is 90°.

Noon sun altitude: the sun's altitude at 12 o'clock in the day

Earth's revolution.

discuss:

1. At the spring equinox, summer solstice, autumnal equinox and winter solstice, which latitude does the sun shine directly on?

2. How does the sun's direct point move between the northern and southern hemispheres?

3. Fill out the form below.

practise

1. It is known that the direct point of the sun moves from point A to point B. Which solar term is each point in the picture? What is the date?

Today, between which two solar terms is the direct point of the sun located, in which hemisphere, and in which direction is it moving?

2. The period when the direct sun point is located in the northern hemisphere but moves southward is:

June 22nd - September 23rd

3. During the period from January 1st to January 10th, the direct sunlight point:

A is in the northern hemisphere and moves north B is in the northern hemisphere but moves south

C In the southern hemisphere, but moving north D In the southern hemisphere, moving south

4. Among the following dates, the direct point of the sun is closest to the Tropic of Cancer:

A April 2 B June 2 C May 2 D July 2

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For more information about the "Earth's Movement Earth and Maps" PPT courseware, please click the Earth's Movement ppt Earth and Maps ppt tag.

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Update Time: 2024-10-03

This template belongs to Geography courseware People's Education Edition Geography for Grade 7 Volume 1 industry PPT template

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