Level 2: Solid, liquid, gas

Heat and matter · level 2 of 8 · rough age 7-8 (a guide for parents; anyone can start anywhere)

Water can be ice, water or steam. In this level you meet the three states of matter and the changes between them: melting, freezing, boiling, evaporation and condensation. Then you find the ice on Mars, including ice made of frozen air.

Lesson	You will be able to
Solids, liquids and gases	Sort things into solids, liquids and gases by how they behave
Melting and freezing	Explain melting and freezing, and what a melting point is
Boiling and steam	Describe boiling, and say what steam really is
Evaporation	Explain why puddles dry up, and what makes them dry faster
Condensation	Explain why a cold glass gets wet on the outside
Ice on Mars	Describe the ice on Mars, and ice that turns straight into gas

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