Unit 2 Wish you were here Section Ⅰ Welcome to the unit，Reading 课件（牛津版必修2，安徽专用）.ppt

The Antarctica is all ice all year round.The highest temperature ever recorded there is zero，at the South Pole.Explorers used to think that a place so cold would have a heavy snowfall.But less than ten inches of snow falls each year.The little snow that falls in Antarctica never melts.It continues to pile up deeper and deeper year after year and century after century.When the snow gets to be about eighty feet deep，it is turned to ice by the weight of the snow above it. Geographic South Pole The Geographic South Pole is one of the two points where the earths axis of rotation intersects the surface(the other being the Geographic North Pole)．This is the point usually meant when an unspecified“south pole” is mentioned. The first humans to reach the Geographic South Pole were Norwegian Roald Amundsen and his party on December 14,1911.Amundsen named his camp Polheim.Amundsens main competitor Robert Falcon Scott reached the Pole a month later.On the return trip Scott and his four companions all died of hunger and extreme cold.There have been many expeditions to arrive at the South Pole by surface transportation.The leaders of some of the first of these are，in order：Amundsen，Scott，Hillary，Fuchs，Havola，Crary，Fiennes.US Admiral Richard Byrd，with the assistance of his first pilot Bernt Balchen，became the first person to fly over the South Pole on November 29,1929. The fastest unsupported walking journey to the Geographic South Pole from the ocean is 47 days and was set in 1999 by explorers Tim Jarvis and Peter Treseder，who hauled 200 kg sleds containing food and cooking fuel. At present，Antarctica is located over the South Pole，although this has not been the case for all of Earths history because of continental drift.The Amundsen-Scott South Pole Station was established during the International Geophysical Year in 1958 and is permanently staffed by research and support personnel. 根据文章内容回答下列问题 ①What did explorers use to think of the amount of the snow that falls in A