"The Phenomenon of Day and Night" PPT download of the movement of the earth

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"The Phenomenon of Day and Night" PPT download of the movement of the earth

Part One Content: Exploration Activities

day and night hypothesis

1. The earth does not move and the sun revolves around the earth.

2. The sun does not move and the earth revolves around the sun

3. The sun does not move and the earth rotates

4. The earth revolves around the sun and at the same time the earth rotates

Think about it: Which of these four hypotheses is correct?

1. The earth does not move and the sun revolves around the earth;

2. The sun does not move and the earth revolves around the sun;

3. The sun does not move and the earth rotates;

4. The earth revolves around the sun and at the same time the earth rotates.

PPT on the alternation of day and night, part 2: expansion and extension

The earth is one of the eight planets in the solar system. The eight planets are arranged in order from nearest to far from the sun, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

The earth is a non-luminous, opaque sphere. The half of the earth illuminated by sunlight is day (day hemisphere), and the half of the earth not illuminated by sunlight is night (night hemisphere). The dividing line between the day hemisphere and the night hemisphere is called the twilight line.

PPT on the alternation of day and night, part 3: Class summary

There are many explanations for the phenomenon of day and night, which is related to the relative circular motion of the earth and the sun.

PPT on the alternation of day and night, part 4: exercises for this lesson

1. Judgment questions

1. There are many hypotheses that can explain the day and night phenomenon, but only one is consistent with the real situation. ( )

2. The relative circular motion of the earth and the sun may produce the phenomenon of day and night. ( )

3. The Earth is a luminous, transparent sphere. ( )

4. The Earth is one of the eight planets in the solar system. ( )

2. Multiple choice questions

1.The earth is ( )

A. Sphere B. Spherical C. Circle

2. Which of the following experiments simulates the earth not moving and the sun rotating ( )

A. The ping pong ball does not move and the flashlight rotates around it.

B. The flashlight does not move and the ping pong ball rotates around it

C. The ping pong ball rotates and the flashlight rotates around it

PPT on the alternation of day and night, part 5: homework

Find information to explain what causes the day-night cycle?

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For more information about the PPT courseware "The Movement of the Earth: The Phenomenon of the Alternation of Day and Night", please click on the tag "The Movement of the Earth: The Phenomenon of the Alternation of Day and Night" ppt.

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Update Time: 2024-09-30

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