"The Movement of the Earth" Earth and Map PPT Courseware 4

Description

"The Movement of the Earth" Earth and Map PPT Courseware 4

1. Comparison between rotation and revolution

Movement form: rotation, revolution

Center of rotation Earth's axis Sun

Direction: from west to east (looks different at the North and South Pole) from west to east

Period Sidereal day Solar day Sidereal year Tropical year

speed angular velocity linear velocity angular velocity linear velocity

rotation speed

Linear velocity decreases from the equator to the poles;

At the same latitude, the higher the altitude, the greater the linear speed.

——The arc length that a certain point on the earth's surface rotates in unit time.

Angular velocity

——The angle that a certain point on the earth's surface rotates per unit time.

The angular velocity at any location is 15°/h, and the north and south poles are 0.

2. Movement of the direct sun point

The point on the earth's surface that receives vertical irradiation from the sun is referred to as the direct sun point.

Return motion of the sun's direct point

Year of return: 365 days, 5 hours, 48 ​​minutes and 46 seconds

practise

1. Read the solstice diagram of the Earth’s revolution around the sun and answer the following questions:

(1) Draw the direction of the Earth’s revolution on the orbit

(2) Determine the corresponding solar terms of ABCD:

(3) The period when the direct sun point moves northward is: A——C

(4) Mark the approximate positions of perihelion and aphelion at the corresponding positions in the figure.

2. On the seagoing ship heading east from Shanghai to San Francisco, the day and night cycle seen by the crew

A. is one solar day B. is shorter than one solar day

C. Longer than a solar day D. A sidereal day

3. Compared with the synchronous satellites launched by our country in the area above the equator, compared with the corresponding points on the equator

A. The direction of movement is the same, but the linear speed is different.

B. The direction of motion is the same but the angular velocity is different.

C. Different movement directions and different linear speeds

D. Different directions of movement but the same angular velocity

4. Viewed from the sky above the Antarctic, plane A flies counter-clockwise along the Antarctic Circle; viewed from the sky above the North Pole, plane B flies clockwise along the Arctic Circle. The flight directions of the two planes are:

A. All from east to west

B. Machine A is heading east and machine B is heading west.

C. All from west to east

D. Machine A is heading west and machine B is heading east

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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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File Info

Update Time: 2024-11-21

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

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