Materials and their properties

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Across
  1. 2. Easy to bend without breaking
  2. 5. Allows liquids or gasses to pass through it
  3. 6. Allows light to pass through
  4. 8. Not able to be seen through
Down
  1. 1. Resists water
  2. 3. Solid and can't be broken easily
  3. 4. Easily catches fire
  4. 7. Easy to mould and shape