physical setting earth science

Part CAnswer all questions in this part.Directions (66–83): Record your answers in the spaces provided in your answer booklet. Some questionsmay require the use of the Earth Science Reference Tables.Base your answers to questions 66 through 68 on the information below, which describes the past andpresent climate of Antarctica, and on your knowledge of Earth science.Antarctica’s ice sheet has an average thickness of 6600 feet and holds approximately70% of Earth’s freshwater. Ice layers in Antarctica preserve information aboutEarth’s history. Fossil evidence found in the bedrock of this continent shows thatAntarctica was once tropical and is a potential source of untapped natural resources.Antarctica is now a frozen desert with very little snowfall.66 Explain why Antarctica’s cold climate is responsible for its very low amount ofyearly precipitation. [1]67 What evidence is preserved in Antarctica that provides information about Earth’spast climates? [1]68 Scientists are concerned that the Antarctic ice may melt as the result of globalwarming. State one effect that this melting would most likely have on Long Island,New York. [1]P.S./E. Sci.–Jan. ’06 [21] [OVER]