#1. which layer of the atmosphere does the space shuttle travel in? #2. which of the following is important for a temperature inversion? (points : 3) two layers of warm air, one on top of the other a layer of cold air over one of warm air two layers of warm air a layer of warm air over a layer of cold air. #3. earth's second atmosphere (atmosphere ii) was a thick atmosphere of primarily water vapor and carbon dioxide. what effects did this have on earth? (points : 3)
helium and hydrogen gases escaped earth's gravity.
heat energy was retained and water vapor condensed.
ultraviolet light split water vapor into hydrogen and oxygen.
increased oxygen allowed reptiles to thrive.