Grade 1 · Science · Lesson 20

Water Changing States

Water is remarkable — it is the only substance on Earth that we regularly experience in all three states of matter. The same water molecules become ice in your freezer, liquid in your glass, and invisible steam above a boiling kettle.

What this lesson teaches

1Sequence the five steps of water changing from solid ice to steam
2Name the four change processes — melting, freezing, evaporation, and condensation
3Explain that heat drives these changes

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