Work

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Across
  1. 2. Type of wood derived from coniferous trees
  2. 5. Strong and corrosion-resistant metal
  3. 6. Type of wood derived from deciduous trees
  4. 7. Valuable metal often used in jewelry
  5. 8. Lightweight metal commonly used in aircraft
  6. 9. Surface wear caused by rubbing or friction
  7. 13. Reddish-brown metal; conductor of electricity
  8. 14. Can deform and return to its original shape; stretchy
Down
  1. 1. Durable and strong
  2. 3. Force that opposes the motion of two surfaces in contact
  3. 4. a strong and durable metal
  4. 7. Transparent material often used for windows
  5. 10. Easily broken or shattered; lacks flexibility
  6. 11. Durable metal commonly used in alloys
  7. 12. Having great weight