Across
- 1. a heavy silver-white poisonous metallic element
- 3. a yellow precious metal
- 6. it can produce fuels including petrol, paraffin,oil
- 10. another name for potassium hydroxide
- 12. a strong, hard magnetic silvery-grey metal
- 13. land any land good to grow crops.
- 14. it is called also wolfram
- 16. it is used to make stainless steel
- 18. the chief commercial ore of aluminium
- 19. a precious shiny greyish-white metal
Down
- 2. burns as a solid fossil fuel
- 4. a clear and colourless crystalline form of pure carbon
- 5. it tarnishes to a dull gray color when exposed to air
- 6. it a salt or ester of a phosphoric acid
- 7. wood prepared for use in building and carpentry
- 8. it is used as glass furnace electrodes
- 9. it has the symbol Cu
- 11. it provides us with nuclear fuel
- 15. a flammable substance consisting of methane
- 17. it is used for protecting iron against corrosion.