Measurement & Data
GradesGrade 3Measurement & DataMass & Liquid Volume

Mass & Liquid Volume

📊 Measurement & Data
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Mass & Liquid Volume

Measure how heavy things are (mass) and how much liquid fits inside (volume)!

MASS measures how much matter is in an object. We use grams (g) and kilograms (kg). LIQUID VOLUME measures how much liquid a container holds. We use milliliters (mL) and liters (L). Knowing these units lets us read scales and measuring cups!

Mass units

1 gram (g) ≈ a small paperclip1 kilogram (kg) = 1,000 grams ≈ a textbook

Volume units

1 milliliter (mL) ≈ a few drops1 liter (L) = 1,000 mL ≈ a large water bottle

Use grams and mL for small amounts; use kilograms and liters for large amounts.

🍎Everyday masses
A large apple ≈ 200 g
A bag of flour  ≈ 1 kg
A textbook      ≈ 500 g
A bicycle       ≈ 10 kg
đŸĨ›Everyday liquid volumes
A spoonful of medicine  ≈ 5 mL
A glass of water        ≈ 250 mL
A carton of juice       ≈ 1 L
A fish tank             ≈ 20 L

Solving measurement word problems:

1Identify what you are measuring (mass or liquid volume)
2Check the units given in the problem
3Set up an addition or subtraction equation
4Solve and label your answer with the correct unit
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Remember This!

Remember: 1 kg = 1,000 g and 1 L = 1,000 mL. When a problem mixes units, convert to the smaller unit before computing.

✏ī¸ Try It!

A pitcher holds 2 liters of lemonade. You pour out 750 mL. How much lemonade is left in milliliters?

Take Quiz 📝 — 25 Questions