Summary
Bill cracks open the story in rocks and soil - how they form, how they break down, and how layers record Earth's past.
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Teaching resources
Discussion questions
Discussion
Bill cracks open the story in rocks and soil - how they form, how they break down, and how layers record Earth's past..
- How does solid rock become soil over time?
- What can the layers in a rock tell us?
- Why is healthy soil important for plants?
Quick work-a-long
Vocabulary: rock, soil, weathering.
Try it: Examine a pinch of soil and list what you can see in it (sand, bits of plants, etc.).