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