Natural Science Unit 7 and 8

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Across
  1. 2. a material that does not allow electrical charges to move
  2. 5. a mixture in which the different components can be distinguished
  3. 7. a chemical reaction that happens when some metals such as iron combine with oxygen in the presence of water
  4. 8. a type of matter which contains only one type of component
  5. 9. a method used to separate liquids that have different boiling points in homogenous mixtures
  6. 10. a closed path through which electricity flows
  7. 11. a method used to separate solids from liquids, or solids with different size particles, in heterogenous mixtures
  8. 13. a chemical reaction that happens when objects or substances are burned
  9. 17. a type of matter that contains two or more pure substances
  10. 18. the force of attraction exerted by magnets
  11. 19. a mixture in which the different components cannot be distinguished
  12. 20. the component of an electrical circuit which provides the electricity
  13. 22. a method used to separate substances of different density in heterogenous mixtures
Down
  1. 1. these happen when atoms react and group together differently
  2. 3. another word for homogenous mixtures
  3. 4. a device with a magnetic needle that always points north
  4. 6. the flow of electrical charges through materials
  5. 11. a chemical reaction that happens in some living things, such as yeast and bacteria
  6. 12. a material which allows electrical charges move
  7. 14. an object which can attract other objects made of iron or other magnetic metals
  8. 15. the component of an electrical circuit which transfroms electricity into another type of energy
  9. 16. a connecting wire, usually made of copper, wrapped in plastic covering
  10. 21. a method used to separate solids from liquids in homogenous mixtures