Become familiar with scales with different intervals when measuring in grams | Maths

Starter quiz

Look at the image showing a brick and a feather. Which is heavier?
- The brick is heavier than the feather. ✓
- The feather is heavier than the brick.
- They are the same mass.
Look at the image. Which object has greater mass?
- The egg has the greater mass.
- The cake has the greater mass.
- The mass of the egg and the cake are the same. ✓
One hundred is composed of ten equal parts of ______.
- '10' ✓
Using the number line, match the letter to its number.
- A
  
  ⇔
  
  20 ✓
- B
  
  ⇔
  
  50 ✓
- C
  
  ⇔
  
  90 ✓
One hundred is composed of five equal parts of ______.
- '20' ✓
Look at the number line. Label the missing number.
- 130
- 160 ✓
- 175

Look at this scale. What are the intervals going up in?
- '100s' ✓
Look at the scales. Which number is missing from where the arrow is pointing to?
- '600' ✓
Look at the scales. Which object has a greater mass?
- The box has the greater mass.
- The basket has the greater mass. ✓
- Both objects have the same mass.
Look at the scales. Which object has the greater mass?
- The cabbage has the greater mass. ✓
- The watermelon has the greater mass.
- Both objects have the same mass.
Starting with the smallest, put these scales in order of the mass they are showing.
- 1
  
  ⇔
  
  A
- 2
  
  ⇔
  
  C
- 3
  
  ⇔
  
  B
Starting with the smallest, put these scales in the order of mass that they are showing.
- 1
  
  ⇔
  
  B
- 2
  
  ⇔
  
  C
- 3
  
  ⇔
  
  A

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When comparing masses - if the scales have different intervals or the zero is in different places.

Remind children that the scale is a number line and we always read number lines from zero; the further the arrow travels, the greater mass.

Mass - Mass is a measure of how much matter something contains. It is measured by how much something weighs. Mass can be measured in grams.
Gram - A gram is a metric measure of mass (which we feel as weight). A paper clip weighs about 1 gram. The abbreviation is g.
Interval - Intervals are the spaces between given numbers. They include all given numbers between the numbers marked at the start and end.