10. 3D Measurement

Lesson

Do you remember units of capacity ?

What is the appropriate capacity unit to measure a cup of coffee?

A

\text{L}

B

\text{ML}

C

\text{mL}

Worked Solution

Idea summary

It is useful to know the capacity of some common objects so that we can estimate the capacity of new objects.

How do we know which unit of capacity to use?

Choose the most appropriate unit of measure for finding the amount of water in a dam.

A

Millilitres

B

Megalitres

C

Litres

Worked Solution

Idea summary

A millilitre is about the size of a drop of water.

A litre is about the size of a milk carton.

A megalitre, is a milltion litres, and is about the size of a dam.

Let's explore some bigger things to find out more about units for capacity.

When referring to the capacity of a pool, which of the following could be an appropriate unit to use?

Select all correct options.

A

\text{mL}

B

\text{L}

C

\text{ML}

Worked Solution

Idea summary

Millilitres can be used to measure the amount of water in a glass.

Litres can be used to measure the amount of water in a large bottle or small pool.

Megalitres can be used to measure the amount of water in a large pool or dam.

How can we use things we know to estimate the capacity of larger objects?

What is the best estimate for the volume of liquid in this container if it is able to hold 1250 \text{ mL} when full?

A

750 \text{ mL}

B

250 \text{ mL}

C

1500 \text{ mL}

D

500 \text{ mL}

Worked Solution

Idea summary

We use the following units to measure the capacity, or how much something holds, of objects:

Unit | Abbreviation |
---|---|

millilitre | mL |

litre | L |

kilolitre | kL |

megalitre | ML |

selects and uses the appropriate unit to estimate, measure and calculate volumes and capacities, and converts between units of capacity