"Is the Earth Revolving?" Earth's Movement PPT Download

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"Is the Earth Revolving?" Earth's Movement PPT Download

Part One Content: Exploring New Lessons

Earth's revolution

The movement of the Earth around the Sun is called the Earth's revolution. Because there are other celestial bodies in the solar system that orbit the sun together with the earth, and the sun is their common central celestial body, it is called "revolutionary" rotation.

The time it takes for the earth to revolve around the sun is the earth's revolution period. Generally speaking, the Earth's revolution period is one year.

Simulation experiment

If the earth really revolves around the sun, when it moves counterclockwise from point A to point B on its orbit, what will people on earth see when they observe stars 1 and 2 at different distances in the sky? What about the phenomenon?

experimental method:

1. Draw a circle on the playground and place a red round piece of paper in the center to represent the "sun".

2. Find two wooden poles and place them at different distances from the circle. Attach two blue round pieces of paper to the top of the wooden pole to represent two stars at different distances.

3. Turn the circle away from the red dot to indicate that the "Earth" revolves around the "Sun".

Thinking: In the orbit of the earth around the sun, what changes are there in the positions of the stars observed at points A and B? How many centimeters does the position of the two stars differ in visual perception?

Is the Earth Revolving? PPT, Part 2: Expansion and Extension

The Earth's revolution period is one year, also called a "sidereal year". The sidereal year is obtained by using a constant star as a reference point. Therefore, it is the time for the Earth to rotate 360 ​​degrees and is the true period of the Earth's revolution.

Class summary

The annual parallax of stars proves that the earth is rotating; the earth moves in two ways: revolution and rotation.

Is the Earth Revolving? PPT, Part 3: Classroom Exercises

1. Fill in the blanks

1. The earth’s motion modes include ( ) and ( ).

2. In 1938, the German astronomer Bessel discovered ( ), which effectively proved that the earth revolves around the sun.

3. One revolution of the earth around the sun is ( ), that is ( ).

2. Judgment questions

1. The sun is the center of the universe. ( )

2. Different seasons have different constellations. The constellations rise in the east and set in the west, appearing and disappearing one after another. ( )

3. The diameter of the earth’s orbit around the sun is approximately 300 million kilometers. ( )

4. The earth is revolving. If you observe the stars in the sky on the earth's orbit, you should also be able to observe the annual parallax of the stars. ( )

Is the Earth Revolving? PPT, Part 4: Homework

Check the data to find out whether other planets are also orbiting?

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"Is the Earth Revolving?" Earth's Movement PPT:

"Is the Earth Revolving?" The Earth's Movement PPT Part One Content: Simulation Experiment of Annual Parallax If the Earth really orbits the sun, when it moves counterclockwise from point A to point B in its orbit, people on the earth observe Stars 1 and 2 at different distances in the sky..

"Is the Earth Revolving?" Earth's Movement PPT Courseware 2:

"Is the Earth Revolving?" Earth's Movement PPT Courseware 2 Pre-class game: Close your left eye, raise your index finger and align it with the vertical lines on the blackboard. Then, open your left eye, close your right eye, and observe the position of your fingers. What do you find? This phenomenon is called vision..

"Is the Earth Revolving?" Earth's Movement PPT Courseware:

"Is the Earth Revolving?" Earth's Movement PPT Courseware 1. The direction of the Earth's revolution: from east to west 2. The period of the Earth's revolution: one year (365 days) 3. The revolution of the sun produces: four seasons. 1. Vernal Equinox (March 21): The global day and night equinox. 2. Summer Solstice (June 22..

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Update Time: 2024-07-01

This template belongs to science courseware Fifth Grade Science Volume 2, Textbook Edition industry PPT template

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