Study

UNIT 1 MATTER AND ENERGY

  •   0%
  •  0     0     0

      Back   Restart
  • What is the smallest unit of matter?
    The atom
  • The change from gaseous to liquid state is...
    Condensation
  • Which process do you use to separate a solution made up by water and salt?
    Filtration / evaporation
  • What is volume?
    The space that an object occupies.
  • The change from liquid to gaseous state is...
    Evaporation
  • Name the two types of mixtures
    Homogeneous and heterogeneous
  • What do you need to burn something?
    Oxygen, fuel and energy.
  • In combustion, the combination of oxygen and fuel produces...
    Energy and waste products
  • Name the pure substances.
    Elements and compounds
  • What is density?
    The amount of matter that occupies an space.
  • What is a reversible change?
    A change that is temporary and the original material can be recovered.
  • Which process do you use to separate two liquids with different densities (such as water and oil)?
    Decantation
  • Which process do you use to separate iron and sand?
    Magnetism
  • What is a compound?
    Two elements that join together to make a molecule
  • True or false: Metals and food can suffer oxidation.
    True
  • Which chemical change involves microorganisms?
    Fermentation
  • What is matter?
    Matter is anything that has mass and occupies space.
  • The change from liquid to solid state is...
    Freezing
  • What can you separate through magnetism?
    Substances with magnetic and non-magnetic properties
  • What chemical reaction is produced when a substance reacts with oxygen?
    Oxidation
  • Open your school bag is reversible / irreversible change.
    Reversible
  • What is an homogeneous mixture?
    A mixture in which we can't distinguish the different substances.
  • Which process do you use to separate two liquids with different boiling points (such as alcohol and water)?
    Distillation
  • What is an irreversible change?
    A change that is permanent and the original material can't be recovered.
  • Chopping a carrot is reversible / irreversible change.
    Irreversible
  • Which units do you use to measure the mass?
    kilograms or grams
  • Which units do you use to measure the volume?
    Litres or mililitres
  • What is a heterogeneous mixture?
    A mixture in which the substances are not joined, so you can distinguish them.
  • Is carbon dioxide (CO2) a compound or a mixture?
    A compound (it is made by 2 atoms of oxygen and 1 atom of carbon)
  • The change from solid to liquid state is...
    Melting
  • What is mass?
    Mass is the amount of matter that an object contains
    • Your experience on this site will be improved by allowing cookies.