The Atmosphere

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Across
  1. 2. transfer the movement of thermal energy
  2. 5. the top layer of the atmosphere
  3. 8. the transfer of heat or electrical energy through direct physical contact
  4. 11. a gas that is H2 on the periodic table
  5. 12. the lower atmosphere
  6. 13. something surrounding the earth
  7. 15. line roughly marking the altitude where traditional aircraft can no longer fly
Down
  1. 1. a gas that is N2 on the periodic table
  2. 3. Dioxide a gas that is CO2 on the periodic table
  3. 4. the transfer of heat through the movement of fluids
  4. 6. t has very few atmospheric molecules
  5. 7. where planes fly
  6. 9. something we need to breath
  7. 10. a gas that is He on the periodic table
  8. 14. layer absorbing the sun's ultraviolet radiation