States of Matter — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Place each everyday item under the state of matter it belongs to.
Solid or Liquid
ice cubejuicewooden chairapplemilk Gas
oxygensteamhelium in a balloon Ice, juice, a chair, an apple, and milk are solid or liquid because they hold a clear shape or pour. Oxygen, steam, and helium are gases that spread through space.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. An ice cube is a solid because it keeps its shape.
Solids have a fixed shape you can see and touch, like an ice cube in your hand.
2. Orange juice is a liquid because it pours into a cup.
Liquids flow and take the shape of whatever container they fill.
3. The air we breathe is made of a mix of gases.
Air is made of gases like oxygen and nitrogen that spread out everywhere.
4. A wooden chair is a solid because it stays the same shape.
Wood is a solid, so a chair keeps its shape whether it is indoors or outside.
5. Steam rising from hot soup is a gas.
Steam is water in gas form, so it spreads out and rises into the air.
Part C: True or False?
Read each statement. Circle True or False.
1. An apple is a solid that holds its shape.
True False
Apples are solids, so they keep one shape until you cut or eat them.
2. Milk is a gas because it spreads everywhere.
True False
Milk is a liquid. It flows, but it stays down inside a container.
3. Helium inside a balloon is a gas.
True False
Helium is a gas that spreads to fill the whole balloon and makes it rise.
4. Oxygen is a solid you can hold in your hand.
True False
Oxygen is a gas in our air. You cannot see it or hold it like a rock.