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

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5 Questions

Q1.
What is a formulation?
Correct answer: A mixture made up of set proportions.
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
Correct answer: Medicines
Correct answer: Paint
Pure iron
Q3.
Does the amount of each substance in the formulation need to be equal?
Correct answer: No
Yes
Q4.
Does the proportion of each substance need to be the same each time the formulation is made?
No
Correct answer: Yes
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.

5 Questions

Q1.
How many types of particle are there in a mixture?
One
Three
Two
Correct answer: Two or more
Q2.
Why can iron filings be separated from sand using a magnet?
Iron cannot be separated from sand using a magnet.
Correct answer: Iron is magnetic.
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?
Correct answer: Evaporation
Filter paper
Magnet
Sieve
Q4.
How can sand be separated from water?
Evaporation
Correct answer: Filter paper
Magnet
Sieve
Q5.
How can rocks be separated from water?
Evaporation
Filter paper
Magnet
Correct answer: Sieve

Lesson appears in

UnitScience / Separating mixtures

Science