Health

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Across
  1. 1. nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, fluorine.
  2. 3. are microscopic solid or liquid matter suspended in the Earth's atmosphere.
  3. 6. are individual metals and metal compounds that negatively affect people's health.
  4. 8. is an inorganic molecule with the chemical formula O3.
  5. 10. group of gases that are composed of nitrogen and oxygen.
Down
  1. 2. is the second layer of the atmosphere.
  2. 4. is the chemical compound with the formula SO2, a toxic gas with a punget and irritating smells.
  3. 5. is a colorless, odorless, and tasteless gas that is slightly less dense than air.
  4. 7. is a type of radiation that is produced by the sun and some artificial sources.
  5. 9. it is the main constituent of natural gas.