Grade 2 science · D.5 · Earth materials
Water and rock
Rivers wear down rock slowly over many years, cutting deep paths that become valleys between hills or mountains. This process is called erosion.
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Jonah and Maya see a river cutting through stone. What does this show?
- Rivers grow trees
- Rivers change Earth's surface (right)
- Rivers create energy
In science class, Omar asks: A river flows through a mountain and makes a deep path. What does this path become?
- A rock
- A hill
- A valley (right)
Kai wonders: How does water change the shape of rock over time?
- It makes new plants grow
- It carves a valley (right)
- It melts ice
Tip: Rivers wear down rock slowly over many years, cutting deep paths that become valleys between hills or mountains. This process is called erosion.
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