# 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, ...