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Whales from the Shore
Age 10 · Biology
Long ago, whale ancestors walked on land on four legs. Over millions of years, their legs became smaller, their nostrils moved to the top of the head, and their bodies became suited to life in the sea.
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Age 10: open this week
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In the picture
- The nostril opening at the tip of the four-legged animal’s snout.
- The nostril opening on the upper snout of the seal-like animal.
- The nostril opening on the top of the long-bodied swimmer’s head.
- The blowhole opening on the top of the large whale’s head.
Examples
- A dog uses four legs to walk and run.
- A whale comes to the surface and breathes through its blowhole.
Key takeaways
- Whales are mammals that breathe air.
- Whale ancestors had four legs and lived on land.
Quiz: Whales from the Shore (Age 10)
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What were whale ancestors like long ago?
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What happened to the legs of whale ancestors over millions of years?
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What happened to the nostril opening as whale ancestors became more aquatic?
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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