Why We Have Seasons
Age 10 · Astronomy
Earth travels around the Sun once a year, and it is tilted, always leaning the same way. So for part of the year the top half of Earth leans toward the Sun and has summer, and later the bottom half has its turn.
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Age 10: open this week
Browse Age 10In the picture
- Earth’s tilted axis: it always points the same way in space
- Northern half leaning toward the Sun: summer in the north
- Southern half leaning toward the Sun: summer in the south
Examples
- When it is summer in Europe in July, it is winter in Australia.
- In summer the Sun climbs high in the sky and the days are long, so you can play outside until late.
Key takeaways
- Earth’s axis is tilted and always points the same way as Earth goes around the Sun.
- The half of Earth leaning toward the Sun has summer, and the other half has winter.
Quiz: Why We Have Seasons (Age 10)
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As Earth travels around the Sun, which way does its tilted axis point?
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Which half of Earth has summer?
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When the northern half of Earth has summer, what does the southern half have?
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