States of Matter — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A ruler is used to measure the length of a solid like a block.
Solids keep their shape, so we measure length or width with a straight ruler.
2. A measuring cup helps us find how much juice or milk is in a recipe.
Liquids take the shape of the container, so measuring cups read the amount.
3. A balloon can show that a gas takes up space when you blow it up.
Gases spread out, and a balloon captures gas to show its volume.
4. A kitchen scale tells us how heavy a solid apple is in grams.
Scales measure mass, which is how much matter is inside a solid object.
5. A graduated cylinder has line marks to measure liquid volume.
The lines let us read exactly how much liquid sits inside the cylinder.
6. A measuring tape can bend to measure the distance around a round solid.
Measuring tapes wrap around solids to find length along curves.
7. A weather balloon carries tools high up to measure gases in the sky.
Scientists study the gases in our atmosphere using instruments on balloons.
8. Milliliters (mL) are units we use for measuring liquids.
Liquids are measured by volume in milliliters or liters.
9. A weather thermometer measures the temperature of air, a gas around us.
Temperature tells us how warm or cold the gas in the air is.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Ruler
→ measures length of a solid
measures how much liquid fills it
Measuring cup
→ measures how much liquid fills it
captures and holds a gas
Balloon
→ captures and holds a gas
measures length of a solid
Kitchen scale
→ measures mass of a solid
measures mass of a solid
Rulers measure solid length. Measuring cups hold liquids. Balloons trap gas. Scales weigh solid mass.