"The Alternation of Day and Night" A Day on Earth PPT Courseware

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"The Alternation of Day and Night" A Day on Earth PPT Courseware

Think about it:

If the earth is transparent, is there day and night?

If the earth itself could emit light, would there be day and night?

If sunlight can illuminate the entire earth at the same time, is there day and night?

Summarize the causes of day and night

The earth itself does not emit light and is not transparent. The sun can only illuminate half of the earth at the same time, creating day and night.

Do the various forms of motion we propose between the sun and the earth explain the phenomenon of day and night?

Movement form 1: The earth does not move and the sun revolves around the earth

Movement form two: the sun does not move, the earth revolves around the sun but the earth itself does not rotate

Movement form three: The earth is rotating

Movement form four: The earth revolves around the sun and rotates at the same time

Warm tips:

1. Adjust the distance between the flashlight and the globe so that it can illuminate half of the globe.

2. Determine a point to observe the day-night cycle.

3. Select the situations you want to verify in order and discuss the methods before proceeding.

4. When several students are doing it, other students will observe whether the day-night alternation phenomenon occurs and record the results.

Talk about the harvest:

People may have many explanations for a natural phenomenon, but to find an explanation that is consistent with the real situation we need more information and evidence. When we get more evidence, the more likely we are to make more reasonable conclusions about the phenomena we see. The better the explanation, the closer we are to the truth.

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For more information about the PPT courseware "Day and Night Alternate One Day on Earth", please click the Alternate Day and Night ppt One Day on Earth ppt tag.

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Update Time: 2024-10-02

This template belongs to science courseware E-education edition sixth grade science volume 1 industry PPT template

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