Comparing and estimating mass and volume
I can compare objects with ones I know to estimate mass and volume.
- Year 3
Comparing and estimating mass and volume
I can compare objects with ones I know to estimate mass and volume.
Lesson details
Key learning points
- The size of something does not determine how much mass (or matter) an object has.
- Taller containers do not always hold a greater volume of liquid.
- If you know the mass and volume of some objects, it is easier to estimate others by comparing them.
Keywords
Estimate - An estimate is a given value, number or quantity that is near to the true amount; it is a number close enough to the right answer.
Mass - Mass is a measure of how much matter something contains. It is measured by how much something weighs. Mass can be measured in g or kg.
Volume - Volume is the specific amount of liquid in a container. Volume can be measured in millilitres or litres.
Common misconception
Larger objects have a greater mass. Taller containers have a greater capacity and/or volume.
The size of something does not determine how much mass an object has; taller containers may be narrower and so may not hold as much liquid.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Which of these would you use grams to measure?
Q2.Look at these objects. Which has the greater mass?
Q3.A glass holds 250 ml of water. Compare this volume to a volume of one litre. Which statement is true?
Q4.What is the mass of this teddy bear?
Q5.What volume of water is in this jug?
Q6.Starting with the smallest, put these containers in order of their capacity.
Assessment exit quiz
6 Questions
Q1.Look at these two bags. They are the same size. Will they have the same mass?
Q2.Look at these bags. Which has the greater mass?
Q3.Look at these containers. Which has the greatest capacity?
Q4.Andeep holds a pebble and compares its mass to the mass of a 50 g egg that he is holding. The pebble feels lighter than the egg. Which statement is true?
Q5.The mass of a toy car is smaller than the mass of a 50 g egg but greater than that of a 10 g pound coin. What could its mass be?
Q6.Using these clues, starting with the object with the smallest mass, put these objects in order.
