Use correct standard units and tools to measure mass (kg/g)

Introduced in the Year 2 curriculum as: "Choose and use appropriate standard units to estimate and measure length/height in any direction (m/cm); mass (kg/g); temperature (°C); capacity (litres/ml) to the nearest appropriate unit, using rulers, scales, thermometers and measuring vessels"

We measure the weight of light things in grams (g). We measure the weight

of heavier things in kilograms (kg). 1 kilogram = 1000 grams. We can use

electronic or balance scales to measure the weight of something. We use

words like heavier and lighter to describe weight.

Example 1:

This pencil weighs 8 grams and is lighter than the dog.

Example 2:

This dog weighs 8 kilograms and is heavier than the pencil.

Example 3:

This apple weighs about 100 grams. The apple is lighter than the rabbit.

Example 4:

This rabbit weighs about 2 kilograms. The rabbit is heavier than the apple.

Example 5:

This rabbit weighs about 2 kilograms. Tom says we can also say the rabbit weighs about 2000 grams.

Is he correct?

Well, 1 kg is equal to 1000 grams.

2 x 1000 = 2000 grams, so Tom is correct.