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Combined science (Edexcel Higher)
Separating substances

Starter quiz

  • In chemistry, what distinguishes a compound from an element?
    • Compounds can be broken down into simpler chemicals.  ✓
    • Compounds are always liquid at room temperature.
    • Elements contain multiple types of atoms.
    • Elements are always gases.
  • Order the states of matter from most to least freedom of movement:
    • 1
      ⇔
      Gas
    • 2
      ⇔
      Liquid
    • 3
      ⇔
      Solid
  • Which is only a characteristic of a chemical change (compared to a physical change)?
    • change in state
    • increase in temperature
    • formation of a new substance  ✓
    • change in mass
  • What defines an element in chemistry?
    • a mixture of compounds
    • a substance with varying properties
    • a substance made of one type of atom  ✓
    • any solid material
  • What property measures how much matter is in a substance?
    • 'mass' ✓
  • In chemistry, ______ chemicals refer to substances that only contain one type of fundamental unit, like an atom or molecule.
    • 'pure' ✓
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