"Earth's Revolution" PPT courseware download

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"Earth's Revolution" PPT courseware download

Part One: Self-Study Guidance

1. Direction and period of revolution

1. What is the Earth’s revolution?

2. What is the direction of the earth's revolution? What is the cycle?

3. What are the characteristics of the earth’s revolution?

4. What phenomena will occur as a result of the Earth’s revolution?

2. Changes in the Four Seasons

1. How do the four seasons change?

2. How do the four seasons change?

3. Five zones on the earth

1. How are the five zones on the earth divided?

think:

1. The national flag in Tiananmen Square in Beijing rises with the sunrise and lowers with the sunset every day. The flag-raising time on January 1, 2012 is 7:36, and the flag-lowering time is 16:25; the flag-raising time on July 1, 2012 is 4:54, and the flag-lowering time is 19:29. Why are there differences in the flag raising and lowering times between these two days?

2. Xiaoliang’s family in the village lives on the first floor. He found that at noon, most of the yard was blocked from the sunlight by the building in front; in midsummer, almost the entire yard was filled with sunlight. Have you ever felt the same way?

1. Direction and period of revolution

The direction of the earth's revolution is from west to east, and the period is one year, which is about 365 days.

As the Earth revolves, its axis is tilted, and its spatial direction remains unchanged, with its northern end always pointing near the North Star. The earth's orbit is elliptical.

2. Seasonal changes

In life, we are always experiencing the changes and replacements of the four seasons of spring, summer, autumn and winter. In addition to feeling the difference between cold and warm and observing the growth changes of plants, you can also feel the changes in the rising and setting times of the sun and the length of the shadow of objects at noon. What causes these changes in the four seasons?

The division of three and five zones

How are the five zones on the earth divided?

The earth is a huge sphere. At different latitudes, the sunlight exposure is different. There is more or less light and heat, and there are differences in cold and heat. We divide the earth's surface into five zones based on how much solar heat is received at different latitudes.

The Earth’s Revolution PPT, Part 2: Meeting the Standard in Class

1. Revolution: While the earth is _______, it is also constantly rotating around _______.

2. The direction of the earth’s revolution is: ______________.

3. The period of the earth’s revolution is: ______________.

4. The geographical significance of the earth’s revolution is: _________, _________, _______________.

5. The date when day and night are of equal length in the northern and southern hemispheres is ()

A. March 21 and June 22 B. March 21 and September 22 C. June 22 and September 23 D. September 23 and December 22

6. When it is winter in the Northern Hemisphere, what season does it belong to in the Southern Hemisphere ( )

A. WinterB. Spring C. Summer D. autumn

7. The place on the earth that has direct sunlight twice a year is ( )

A. EquatorB. Tropic of Capricorn C. Tropic of Cancer D. polar circle

8. When the sun shines directly on the Tropic of Cancer, our country is in peak season ( )

A. Spring B. Summer C. Autumn D. winter

9. In the area north of the Tropic of Cancer in my country, the season with the longest daylight hours is ( )

A. Spring B. Summer C. Autumn D. winter

10. When the sun shines directly on the Tropic of Cancer, which of the following statements is correct ( )

A. The solar term in the northern hemisphere is the vernal equinox

B. There is a polar day phenomenon in the Arctic Circle

C. Extreme daylight phenomenon occurs on the Antarctic Circle

D． At this time, it is summer in the Southern Hemisphere

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"The Revolution of the Earth" PPT download:

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"The Revolution of the Earth" PPT courseware:

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Update Time: 2024-11-15

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

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