Study

Year 8 Earth Resources

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  • What is the raw material that plastics are made from?
    Crude oil
  • What is the cathode?
    The negative electrode
  • What is the word given to a resource that is not in danger of being used up?
    Renewable
  • What is paper made from?
    Trees
  • How are fossil fuels made?
    Remains of dead organisms were buried under layers of sand. Heat and pressure turned the organisms into fossil fuels
  • How could you test a sample of water to see how much salt is dissolved in it?
    Weigh a watch glass, evaporate the water, re-weigh the watch glass and calculate how much salt is left
  • What does the term pure mean in chemistry?
    Something that only contains one element or compound
  • What is electrolysis?
    Using electricity to split up a compound
  • What is the anode?
    The positive electrode
  • When iron oxide reacts with carbon what will the products be?
    Iron + carbon dioxide
  • Using an item again, but in a different way is called what?
    Reusing
  • What is potable water?
    What that is safe to drink
  • What is an electrolyte
    A liquid that conducts electricity
  • What do we need to heat copper oxide with to extract copper metal?
    Carbon
  • Which word means a resource that is in danger of being used up?
    Non-renewable
  • Which metal is found in the Earth in it's native state (not bonded to any other elements)?
    Gold
  • What is recycling?
    Breaking the item down into its raw materials and turning it into something new
  • Using less of something to preserve our natural resources is called what?
    Reducing
  • What process is used to extract metals from compounds when the metal is more reactive than carbon?
    Electrolysis
  • Give an example of a renewable resource
    Trees
  • What does the term impure mean?
    When a substance is mixed with something else