L1

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Across
  1. 3. The ability of a material to last long time without significant deterioration
  2. 5. The ability of a material to resist scratching, wear and tear, cuts and indentation
  3. 7. Ability of a material to prevent light passing through it
  4. 8. Related to Heat
  5. 9. A natural material
  6. 10. Ability of a material to allow some lights only to pass through it
  7. 12. A material which is both Hard and Brittle
  8. 14. A man-made wood
Down
  1. 1. The ability of a material to be reshaped in all directions into thin sheet without cracking
  2. 2. Ability of a material to let light go through it
  3. 4. The interaction of Light with a material
  4. 6. A grey shiny metal which possesses good electrical conductivity and malleability
  5. 8. The ability of a material to withstand a blow
  6. 11. The ability of a material to be drawn out into thin wire or thread
  7. 13. A reddish brown shiny metal which has good electrical conductivity and ductility