States of Matter — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A solid holds its own shape and does not flow.
Solids keep a fixed shape, so they do not pour or spread out.
2. A liquid takes the shape of the container it is in.
Liquids flow until their top is flat and their sides match the container.
3. A gas spreads out to fill the whole space around it.
Gases keep moving and fill up all the room they are given.
4. Ice is the solid state of water.
When water gets cold enough, it freezes into the solid we call ice.
5. Steam is the gas state of water.
When water boils, it becomes the gas called steam.
6. Air is a gas we cannot usually see.
Air is made of gases that are invisible but still take up space.
7. A stone at the park is a solid.
Stones hold their shape, so they are solids.
8. Water poured into a bottle is a liquid.
Water flows and takes the shape of the bottle, so it is a liquid.
9. Matter is anything that has weight and takes up space.
All three states of matter take up space around us.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
ice
→ Solid water
Solid water
water
→ Liquid state
Liquid state
steam
→ Gas from boiling
Gas from boiling
stone
→ Hard solid rock
Hard solid rock
Ice is solid water, liquid water is the flowing state, steam is the gas that comes from boiling, and a stone is a hard solid rock.