Measuring Liquids & Masses
Measure and estimate liquid volumes and masses of objects using grams, kilograms, and litres; solve one-step word problems involving mass or volume
What a learner can do afterwards
- Estimate the mass of a textbook in grams or kilograms
- Read a scale to measure liquid volume in litres
- Solve: 3 bags weigh 250 g each — what is the total mass?
The lesson
Everything has a mass, which tells you how heavy it is. Small masses are measured in grams (g), and bigger ones in kilograms (kg). One kilogram equals 1,000 grams. Liquids like water or juice are measured in litres (l), and one litre equals 1,000 millilitres (ml).
Mia buys 3 bags of apples. Each bag weighs 250 g. She adds 250 + 250 + 250, or multiplies 3 x 250, to get 750 g in total.
Remember: 1 kg equals 1000 g, and 1 l equals 1000 ml. If a 2 litre bottle of juice is poured into 250 ml cups, divide 2000 by 250 to find out how many cups you can fill.
Grams and kilograms measure mass, litres and millilitres measure liquid, and 1 kg is 1000 g while 1 l is 1000 ml.
Watch it
Where it sits
Learn first
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Nothing builds on it yet.
Where this leads
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.