Year 2 - Maths
Compare and order measurements of mass
Sense of measure - capacity, volume and mass
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will choose, use and compare appropriate standard units to estimate and measure length/height mass, capacity and temperature to the nearest appropriate unit.
Lesson Summary
You will learn to compare and order measurements of mass.
Key Notes
- When the units are the same, you can compare masses in the same way as we compare 2-digit numbers.
- When the units are the same, you can order masses in the same way as we order 2-digit numbers.
- When the units are different, you can compare masses by looking at the unit rather than the numbers.
Vocabulary To Learn
- Lighter: When one object has less mass than another, it is lighter.
- Lightest: When an object has the least mass than all the others in a set, it is the lightest.
- Heavier: When one object has more mass than another, it is heavier.
- Heaviest: When an object has the greatest mass than all the others in a set, it is the heaviest.
Common Mistakes To Avoid
- Children often believe that the size of the item relates to its mass and that a larger item will always be heavier than a smaller item.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
When the units are the same, you can compare masses in the same way as we compare 2-digit numbers. When the units are the same, you can order masses in the same way as we order 2-digit numbers.
2. Use this key word in a maths sentence and explain it clearly. 'Lighter'
When one object has less mass than another, it is lighter. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Children often believe that the size of the item relates to its mass and that a larger item will always be heavier than a smaller item. Correction: Explore examples where the larger item is lighter and the smaller item is heavier to address this misconception. For example, compare the mass of an inflated balloon with a stone, or an empty box with a small bag full of coins.
More Lessons In This Unit
- Compare and order lengths Study Guide
- Compare and order measurements of volume and capacity Study Guide
- Explain why standard units of measure are needed Study Guide
- Length can be measured in any direction to give height, length and distance Study Guide
- Length can be measured in metres and centimetres Study Guide
- Mass can be measured in grams and kilograms Study Guide
- Read scales in metres and centimetres Study Guide
- Temperature Study Guide
- Volume and capacity can be measured in litres and millilitres Study Guide
Browse all guides in the Year 2 Maths guide library.