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Combined science (AQA Higher)
Separating substances

Starter quiz

  • Which picture shows an insoluble substance?
  • Mass is measured in ...
    • centimetres.
    • millilitres.
    • grams.  ✓
    • centimetres-cubed.
  • Sugar dissolves in water, so sugar can be described as a ______ solid.
    • 'soluble' ✓
  • A ______ is a material formed from two or more substances which can be physically separated.
    • 'mixture' ✓
  • Some students have been asked to describe this diagram using key terms. Who has used their key words correctly?
    Some students have been asked to describe this diagram using key terms. Who has used their key words correctly?
    • That shows a pure liquid.
      That shows a pure liquid.
    • I think that might be a liquid mixture.
      I think that might be a liquid mixture.
    • I'm fairly certain this shows an impure solid.
      I'm fairly certain this shows an impure solid.
    • I reckon that's a pure solid.
      I reckon that's a pure solid.  ✓
  • Melting is a reversible, physical change. Which of the following statements is also true about melting?
    • Melting is what happens when a substance disappears.
    • Melting occurs when solid particles become more regularly arranged.
    • Melting is the process of a substance disappearing in a liquid.
    • Melting occurs when solid particles become more irregularly arranged.  ✓
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