Materials

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Across
  1. 2. something that can be stretched easily
  2. 6. weighing only a little or less than average
  3. 8. a chemical element that is an important part of coal and oil
  4. 10. something that is made of different things
  5. 11. any rubbery material composed of long chain like molecules
  6. 13. to break, or to break something, into smaller parts
  7. 14. a material that can be melted and formed into shapes that become hard and then melted again.
  8. 15. the quality of being close together and difficult to go or see through
Down
  1. 1. something that can be changed easily
  2. 3. a material that can be melted and formed into shapes that become hard and cannot be melted again.
  3. 4. to make something stronger
  4. 5. something that can be joined together
  5. 7. something that can be bent easily
  6. 9. the quality of being firm, hard, or unable to bend
  7. 12. to allow electricity or heat to go through