Humans can use tools like a hammer and pick to crack rocks. We can also crack rocks by dropping them from up high. What if there were no humans around though? What could crack something as big as a boulder clean in half?
In this lesson, we’re going to do an experiment to find out, and we’ll learn about the force of nature that is strong enough to crack something as hard as a rock.
What you’ll learn:
- There is a force of nature that is strong enough to crack huge boulders in half.
Lesson Content
Prep
Planning & Materials
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Lesson
Discussion
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Video | How to Crack a Boulder Part 1
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Experiment | Freeze-Thaw Cycle
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Video | How to Crack a Boulder Part 2: Experiment Results
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Keep Exploring
Activity | The Question Asking Game: The Freeze-Thaw Cycle
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Answers
Answer Key | How to Crack a Boulder
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