# How can we separate mixtures into pure substances?

In this lesson we will learn about four ways that mixtures can be separated, including using magnets; evaporation, filtration and sieving.

# How can we separate mixtures into pure substances?

In this lesson we will learn about four ways that mixtures can be separated, including using magnets; evaporation, filtration and sieving.

## Lesson details

### Key learning points

1. Describe how to remove large solids from a mixture
2. Describe how to remove insoluble substances from a mixture
3. Describe how to remove soluble substances from a mixture

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
What is a formulation?
A mixture of metals.
A mixture of two or more different substances.
A pure substance.
Q2.
Which of the following are formulations? Pick 2 correct answers.
Air
Pure iron
Q3.
Does the amount of each substance in the formulation need to be equal?
Yes
Q4.
Does the proportion of each substance need to be the same each time the formulation is made?
No
Q5.
If you want to make double the amount of formulation what do you need to do?
Correct answer: Double the amount of each substance.
Double the amount of the most important substances.
Half the amount of each substance.
Use the same amount of each substance.

## Exit quiz

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### 5 Questions

Q1.
How many types of particle are there in a mixture?
One
Three
Two
Q2.
Why can iron filings be separated from sand using a magnet?
Iron cannot be separated from sand using a magnet.
Sand has a high boiling point.
Sand particles are larger than iron particles.
Q3.
How can salt be separated from water when it is dissolved?
Filter paper
Magnet
Sieve
Q4.
How can sand be separated from water?
Evaporation
Magnet
Sieve
Q5.
How can rocks be separated from water?
Evaporation
Filter paper
Magnet