河北省迁安一中高二英语：book8Uni5：Unit 5Listening.pptVIP

* * 新课标人教版课件系列 《高中英语》 选修(模块）8-5.2 Listening Task 1: P42 The work on early people depends on the dates that are given to the bones found. If the dates are wrong, all the data about early people may also be wrong. So Zhou Heping is very interested to find out how archaeologists make sure their dates are accurate. Listen to the tape and fill the layers in the “ waterpaper basket” diagram on the right. Listen to the tape again. Pay attention to the methods archaeologists use to date bones and how those methods work, then fill in the chart below. Yogurt pot wasterpaper used envelopes Orange skin All living things have ______ in their bodies. When they die, the carbon _______ at a _______ rate. The method measures ___________ of carbon in bones or plants using radioactivity and can ______ how old the remains are. 2 Radiocarbon dating Each layer looks different as they are uncovered, so you can tell where one layer starts and another finishes. In the waste paper basket, the most recent layer is ________, and older layer is below that and the ______ is ___________. 1 Layers in the ground How it works Method at the top oldest at the bottom carbon disappear fixed the amount of work out Listening Task 2: P78 The Terracotta Warriors are one of the greatest Chinese archaeological finds of the 20th century. Since their discovery in 1974 there has been a great deal of interest in their construction, function, and artistic value. Amanda Peters wants to find out more from her Chinese friend, the archaeologist, Zhou Lei, about how to preserve them. Main idea: ____________________________________________________________________________________________________________ Why is the first problem easier to solve? A The solution is simple B Damp can be easily treated C If only occurs when it is hot D A new form of chemical protection has been invented 2. How does the terracotta army show Emperor Qin Shihuang’s power? A They are all the size of a man