Science 24

123456789101112131415
Across
  1. 3. manmade chemicals
  2. 5. compound found in nature
  3. 6. Melting ice cubes
  4. 7. reaction when two or more substances combine to form a new substance
  5. 8. kills off harmful insects
  6. 10. Carbon dioxide
  7. 11. Emmissions from the combustion of fossil fuels
  8. 12. The reaction of an acid and base
  9. 13. workplace hazardous materials information system
  10. 15. an ice pack
Down
  1. 1. The process of burning something
  2. 2. Long term shifts in temperatures and weather patterns
  3. 4. kills unwanted plants
  4. 9. Transformation of pure metals into undesirable substances
  5. 11. mixtures of metals
  6. 14. A process for removing pollutants