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What makes something pure?

In this lesson, we will learn what makes a substance pure or impure. We will also learn to draw diagrams to represent the particles in pure and impure substances.

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What makes something pure?

In this lesson, we will learn what makes a substance pure or impure. We will also learn to draw diagrams to represent the particles in pure and impure substances.

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Share activities with pupils

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Lesson details

Key learning points

  1. Define a pure substance
  2. Give examples of pure substances
  3. Explain how we can tell if something is pure or not

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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.

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5 Questions

Q1.
How are particles arranged in a solid?
Not touching and in ordered rows.
Not touching and not in ordered rows.
Correct answer: Touching and in ordered rows.
Touching and not in ordered rows.
Q2.
How do particles behave in gasses?
They can slide past each other.
They cannot move.
Correct answer: They move fast in all directions.
They vibrate on the spot.
Q3.
How do particles behave in liquids?
Correct answer: They can slide past each other.
They cannot move.
They move fast in all directions.
They vibrate on the spot.
Q4.
Pure substances contain only one type of particle.
False
Correct answer: True
Q5.
Is tap water pure or impure?
Correct answer: Impure because it contains water particles and salt particles.
Impure because it only contains water particles.
Pure because it contains water particles and salt particles.
Pure because it only contains water particles.

Lesson appears in

UnitScience / Separating mixtures

Science

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