Grade 3

States of matter: solid, liquid, gas

Notice that things around us can be solid, liquid, or gas, and some can change from one to another.

Category: World Around Us 8 min Confident
Aa Tap Say Read

Ice is solid water. When it melts, it becomes liquid. When water boils, it becomes steam (gas).

Listen and learn

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A Picture card
Sound card

A rock is solid. It has a fixed shape.

solid

Solids keep their shape.

Example: Rocks, books, and chairs are solids.

W Picture card
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Water is liquid. It takes the shape of its container.

liquid

Pour water into different cups to see.

Example: Liquids flow and change shape.

A Picture card
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Air is a gas. It spreads everywhere.

gas

You cannot hold a gas in your hand.

Example: Gases spread out to fill a space.

I Picture card
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Ice melts into water. Water can freeze into ice.

change of state

Notice how temperature changes the state.

Example: Heating and cooling change the state of matter.

S Picture card
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Steam rises from boiling water. It is water as a gas.

gas example

Be careful near hot things!

Example: Boiling water turns into steam.

Try a worksheet next

These printables match this lesson's stage and theme, so a child can move from screen practice to calm hands-on work.

More in this topic

Keep the reading rhythm going with another tiny lesson.

Grade 2

Air around us

Understand that air is everywhere even though we cannot see it, and learn why it matters.