Miss Kashef here — let's learn how to measure and compare properly!
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Standard Units of Measurement
Hello my curious Grade 3 friends! Today Miss Kashef will teach you how to use standard units to measure mass (in grams and kilograms) and capacity (in litres). We will compare, order, and use real-life examples so you can measure confidently!
Mass – How Heavy?
Mass tells us how heavy an object is.
🪶 light
📚 medium
🪨 heavy
Units of Mass
Grams (g)
Small and light things
Example: 1 apple ≈ 150 g
Kilograms (kg)
Bigger and heavier things
Example: A school bag ≈ 3 kg
1000 grams = 1 kilogram
Comparing Mass
1 kg rice > 500 g rice
A textbook (800 g) is heavier than a pencil (10 g)
Your lunch box (1.2 kg) is heavier than an apple (150 g)
Ordering by Mass
Feather (5 g) → Apple (150 g) → Book (800 g) → Backpack (3 kg)
From lightest to heaviest
Capacity – How Much It Holds
Capacity tells us how much liquid a container can hold.
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Units of Capacity
Millilitres (mL)
Small amounts
Example: A spoon ≈ 5 mL
Litres (L)
Larger amounts
Example: A water bottle ≈ 1 L
1000 millilitres = 1 litre
Real Life Examples
A small juice box = 250 mL
A big bottle of water = 2 L
A bag of sugar = 1 kg
Your lunch box = 800 g
You Are Doing Amazing!
You can now compare and order objects by mass and capacity using standard units!
These skills help us in cooking, shopping, and science.
Well Done, My Measurement Masters! 🌟
You have completed the full lesson on Standard Units of Measurement.
Next time you cook or shop, use grams, kilograms, and litres!