Mon Prof Augmenté
Earth’s Cracked Shell
Age 9 · Science
Earth’s outer shell is not one solid piece. It is cracked into large rigid pieces that slowly shift against each other.
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Age 9: open this week
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In the picture
- A large rigid piece of Earth’s outer shell
- Two neighboring pieces sliding sideways past each other
- Two pieces pulling apart with a widening gap
- Two pieces pressing together at their edges
Examples
- Cracked pieces of an eggshell on a soft-boiled egg
- Ice floes on a pond nudging and sliding past one another
Key takeaways
- Earth’s outer shell is made of large rigid pieces.
- These pieces move very slowly and can slide, pull apart, or push together.
Quiz: Earth’s Cracked Shell (Age 9)
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What is Earth’s outer shell made of?
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How do the large pieces of Earth’s outer shell move?
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What happens when two pieces of Earth’s outer shell pull apart?
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