Mass
Y5
Two standard units for measuring weight are grams and kilograms.
1000 grams = 1 kilogram
1000 g = 1 kg
Look at packets and tins to find their weights. You need sand, plastic bags, rubber bands and a balance.
Make your own weights. Find some packets that are unopened and have weights written on the side.
Place your first object on the scale.
Put a plastic bag on the other scale and fill it
with sand until the scale balances. Write how
many grams this weight is on a small piece of
paper and place it in the bag. Seal the bag
with a rubber band.
Make a range of different weights.
What is the smallest weight you made?
What is the heaviest weight you made?
Use your weights to weigh different objects in the classroom.
Make an estimate first.
Object
Estimate weight, grams Actual weight, grams
It is important children get a feel for weights.
Therefore, practical exercises of picking up weights is very important for estimating.
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