Grade 2 science · D.3 · Earth materials
Sudden or slow change
Some changes, like volcanoes, happen quickly. Others, like wind or water, take years. Know which is sudden and which is slow.
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A volcano erupts and changes the land in a Felix.
- Sudden way (right)
- Quiet way
- Slow way
A volcano erupting changes the land Theo's area in how many days?
- A year
- A few hours (right)
- A month
Zoe and Nora are curious. Wind slowly wears away a hill over many years. This is a Nora change.
- Slow change (right)
- Hot change
- Big change
Tip: Some changes, like volcanoes, happen quickly. Others, like wind or water, take years. Know which is sudden and which is slow.
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