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6. How is concrete made?

  • When cement is mixed with aggregate and mortar
  • When cement is mixed with sand and mortar
  • When cement is mixed with sand and aggregate
  • When cement is mixed with sand and calcuim carbonate

7. What does thermal decomposition mean?

  • Heating a substance up
  • The difference between two compounds
  • The breakdown using heat
  • The death using heat

8. Why is concrete an important building material?

  • Due to it's strength
  • Due to it being renewable
  • Due to it being inexpensive
  • Due to it being a good conductor of heat

9. What is limestone made from?

  • Carbon dioxide
  • Calcuim oxide
  • Calcuim carbonate
  • Calcuim hydroxide

10. What is calcuim hydroxide?

  • An alkali, that can be used to neutralise acids
  • An acid, that can be used to neutralise alkalis
  • A mixture of metals
  • A mixture of calcuim and carbon

11. Where can calcuim carbonate be found?

  • Quarries
  • Oceans
  • Waters
  • Rivers

12. What can calcuim carbondate be broken down into?

  • Calcuim dioxide and carbon oxide
  • Calcuim hydroxide solution
  • Calcuim oxide and carbon dioxide
  • Calcuim hydroxide

13. What causes limewater to turn milky when it is present?

  • Carbon dioxide
  • Calcuim hydroxide
  • Water
  • Oxygen

14. What is formed when cement is mixed with sand?

  • Calcuim oxide
  • Concrete
  • Mortar
  • Calcuim carbonate