Across
- 3. Excellent electrical conductor
- 5. Colored writing fluid
- 7. Device that stores chemical energy
- 10. Heat-resistant inorganic material
- 11. Fiber obtained from sheep
- 12. Material made from wood pulp
- 15. Common building material
Down
- 1. Fired clay building material
- 2. Material used to make clothing
- 3. Thick paper product
- 4. Iron-based alloy
- 6. Ingredient used in concrete
- 8. Transparent amorphous solid
- 9. Fiber produced by silkworms
- 13. Lightweight metal
- 14. Natural plant fiber