A) They become accustom to the lower oxygen content. B) They learn to breath carbon dioxide. C) They move to lower elevations. D) The people use large fans to force more oxygen into the atmosphere at that altitude.
A) head winds B) westerlies C) easterlies D) trade winds
A) carbon free compounds B) carbon dioxide C) chlorofluorocarbons D) ozone
A) Exosphere B) stratosphere C) ionosphere D) troposphere
A) convection B) conduction C) evaporation D) radiation
A) argon B) carbon dioxide C) ozone D) oxygen
A) condensation B) evaporation C) melting D) convection
A) stratosphere B) ionosphere C) troposphere D) Exosphere
A) troposphere B) Exosphere C) stratosphere D) ionosphere
A) troposphere B) ionosphere C) stratosphere D) Exosphere |