# Activity: Discover Mass (Weight)

Mass is how much matter is in something. We can measure this by weighing. So today we will be ...

Weighing!

You will need:

• Kitchen Scales (for smaller items)
• Bathroom Scales (for larger items)
• Pen and paper

You can measure using grams (g), kilograms (kg), ounces (oz) or lbs (lb).

 Weigh a child Weigh your dog

## Examples

Using Kitchen Scales to measure 1 kg (2.2 lb) of sugar

Using Bathroom Scales to measure a 2.5 kg weight

This knife weighs about 75 g (nearly 3 oz)

How did I measure that?

Between 0 and 4oz there are 4 spaces, so each mark means 1oz. The pointer is nearly up to the 3rd mark, which means nearly 3oz.

Likewise between 0 and 100g there are 4 spaces, so each mark means 25g.
The pointer is on the 3rd mark, which means 75g.

Some ideas of things to measure:

• Jars of food
• Bottles (empty or full)
• Spoons
• Cups (with and without water)
• Books
• Toys
• People
• Bags

## Fill In This Table

Write down your Guess just before you measure the Actual weight. As you measure more things, your guesses can get better.

 Item Guess Actual

## From Smallest to Largest

Lastly, list all the items you measured, from the smallest to largest mass.

Example: Small bottle (empty), spoon, ...