Why do historians use chronology as an organizing principle? a. to cover every recorded year in history b. to establish a sense of change over time c. to make sure all major events are represented d. to connect events in history to significant themes e. to show that history is best understood in eras

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste