Year 3 science · D.18 · Earth materials
Rocks break down
Big rocks can turn into small pieces like sand or gravel over time through natural processes such as rain, wind, and temperature changes. This is called weathering.
See worked examples
In science class, Mei asks: A big rock breaks into smaller pieces. What happens next?
- It turns into water
- It becomes gravel and sand (right)
- It grows bigger
Amara and Ana are curious. Which of these shows how a big rock changes?
- Cloud → rain → snow
- Big rock → gravel → sand (right)
- Sand → rock → water
In science class, Leo asks: A big rock falls off a hill. What happens next?
- It grows bigger
- It turns into water
- It breaks into smaller pieces (right)
Tip: Big rocks can turn into small pieces like sand or gravel over time through natural processes such as rain, wind, and temperature changes. This is called weathering.
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