In ice cores' air bubbles, is being used as a climate proxy-an indicator of climate in the past-because it is directly related to the heat-trapping ability of the atmosphere.

The model of human settlement suggests that uthe model of human settlement suggests that urban growth is patterned around transportation networks such as railroads and highways. a. burgess b. hoyt c. sauer d. von thunenrban growth is patterned around transportation networks

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples

Summarize the president's/vice president's roles and responsibilities in 8 sentences