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Why we have seasons
Age 11 · Astronomy
Open to everyone until Friday, November 13
To keep it, print it while it is open.
The Earth travels around the Sun while its axis always leans toward the same direction in space. So during the year, each half of the Earth is sometimes tilted toward the Sun and sometimes away from it.
In the picture
- The Sun: the source of light and heat
- The tilted top leaning toward the Sun: direct light, summer
- The tilted top leaning away from the Sun: weak light, winter
- The Earth’s path around the Sun: one trip takes a year
Examples
- Summer days are long and hot because the Sun shines almost straight down on you.
- In winter the Sun stays low in the sky, so its light is spread out and feels weaker.
Key takeaways
- Seasons come from the tilt of the Earth’s axis, not from its distance to the Sun.
- When one hemisphere has summer, the other has winter.
Quiz: Why we have seasons (Age 11)
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What mainly causes the seasons on Earth?
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When the northern half of the Earth has summer, what season does the southern half have?
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Why is it winter in a half of the Earth?
The answers, each with its explanation, are in the app. This quiz is free there while the lesson is in the free week.
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