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Drifting Plates
Age 9 · Science
Earth’s outer shell is cracked into big pieces called plates. These plates move very slowly, only a few centimetres each year, on top of hot, soft rock.
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Age 9: open this week
Browse Age 9
In the picture
- A colored shell piece: one of Earth’s large broken plates.
- The orange-yellow layer: hot, moving rock beneath the plates.
- A thin arrow on a plate: the slow direction that piece drifts.
Examples
- A snail creeping across a leaf.
- A fingernail growing over several weeks.
Key takeaways
- Earth’s shell is broken into large plates.
- The plates drift a few centimetres a year over hot rock.
Quiz: Drifting Plates (Age 9)
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What is Earth’s outer shell broken into?
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How fast do the plates drift?
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What are the plates moving on top of?
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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