Mon Prof Augmenté
Why we have day and night
Age 9 · Astronomy
The Earth spins around like a top, one full turn every day. The side facing the Sun has day, and the side turned away has night.
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Age 9: open this week
Browse Age 9
In the picture
- The Sun: it shines light on one half of the Earth
- The spinning Earth: it turns around its axis once a day
- The night side: it is turned away from the Sun and stays dark
- A shadow: it changes length and direction as the Earth turns
Examples
- The Sun seems to rise in the morning and set in the evening because your place on Earth turns.
- Your shadow is long early in the morning and short at midday.
Key takeaways
- The Earth turns around once every 24 hours.
- The Sun does not really move across the sky. We move with the Earth.
Quiz: Why we have day and night (Age 9)
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How long does the Earth take to turn around once on its axis?
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Why is it night where you live?
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During the day the Sun seems to move across the sky. What is really happening?
The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.
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