Mon Prof Augmenté
Dust That Grew Into Planets
Age 8 · Astronomy
Tiny rocks and dust in a young star’s disk bumped into each other. They stuck together and grew bigger and bigger until some became planets.
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Age 8: open this week
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In the picture
- Dust grains touching and sticking
- A pebble made from clumped grains
- A boulder made from clumped pebbles
- A rounded rocky planet made from growing boulders
Examples
- A snowball grows as you roll it and more snow sticks.
- Bread crumbs clump into a ball when you press them together.
Key takeaways
- Small bits can stick together to make bigger bits.
- After many collisions, the biggest bodies become planets.
Quiz: Dust That Grew Into Planets (Age 8)
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In a young star’s disk, what happened when tiny rocks and dust bumped into each other?
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What can small bits do to make bigger bits?
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After many collisions, what do the biggest bodies become?
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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