 # 10.07 Choose the right unit for mass

Lesson

## Ideas

Let's review the  units of mass  that we already know by trying this practice problem.

### Examples

#### Example 1

It is most appropriate to use milligrams to measure:

A
A pencil case
B
A pig
C
A small feather
Worked Solution
Create a strategy

Choose the lightest object.

Apply the idea

Milligrams is used to measure very light objects like a small feather. The answer is option C.

Idea summary

Milligrams are appropriate to measure tiny very light objects like a small feather and insects.

Grams are appropriate to measure small light objects like a pencil case or cup.

Kilograms are appropriate to measure heavy objects like people and bikes.

## Units for mass

This video introduces the units of milligrams, grams, kilograms and tonnes and discusses the types of objects that would be measured by these units.

### Examples

#### Example 2

Choose the most appropriate unit of measure for the mass of a biscuit.

A
Grams
B
Kilograms
C
Tonnes
Worked Solution
Create a strategy

Use the table of examples below to compare the mass of a biscuit.

Apply the idea

A block of chocolate is closest to the mass of a biscuit. So we should use grams for finding the mass of a biscuit.

The correct answer is option A.

Idea summary

Mass is a measurement of how much matter is in an object. The weight is a measurement of how hard gravity is pulling on that object.

Examples of when to use certain units of mass: