Vocabulary - Unit 9

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Across
  1. 8. a thing often used to erase pencil
  2. 9. when someone can't hear
  3. 11. when you have no hair, you're ...
  4. 12. a special kind of plastic
  5. 13. very hard alloy of iron and carbon
  6. 16. to fix something
  7. 17. a type of shape characteristic for triangles
  8. 18. rare, expensive metal, in past often used to pay with
  9. 19. to show appreciation
  10. 20. a transparent material made of melted sand
Down
  1. 1. something with a square shape is ...
  2. 2. something that isn't linear is ...
  3. 3. a material that comes from trees
  4. 4. something that doesn't use wires
  5. 5. an act of moving
  6. 6. a very common metal
  7. 7. a device used to store electricity
  8. 10. a cyrcle in 3D is a ... object
  9. 14. a type of metal
  10. 15. when someone has no hair