The document discusses time zones and calculating time differences between locations. It provides the following key points: 1. Time zones are established by dividing the earth into 24 zones separated by 15 degrees of longitude, with each zone spanning one hour. 2. To calculate the time difference between zones, subtract if both are in the same eastern/western zones, and add if one is east and one is west. 3. To calculate the time in another zone, add the time difference if going east, and subtract if going west.

1. Lesson 5

2. SPACESHIP EARTH: A New Journey Each Day and Year

3. Foucault Pendulum 傅科摆 What did this experiment 试验 prove?

4. Rotation

5. The green trace shows the path of the pendulum bob over the ground ， while the blue trace shows the path in a frame of reference rotating with the plane of the pendulum.

6. Earth’s Rotation 地球的自转

7. What’s the physical effect ( 对自然界的影响 ) of Earth’s rotation? Night Day Night and Day

8. Night and Day Day Night

9. How does the Earth’s rotation effect our daily life?

12. the opening ceremony of the 15th Asian Games

13. lighting the Games’ flame ( 圣火） during the opening ceremony of the 15th Asian Games

14. 12 A.M ． Dec.2

15. Why did we have to stay up late 熬夜 for the football match and the opening ceremony of Asian Games at midnight? Different places have time We call the difference . ( 时差 ) time difference Different Video

16. Time Zones （ 时区 ） 80

17. Time Zones 【 Map-Reading 】 How to set time zones? 以本初子午线为基准，划为 ，或叫 。 在中时区以东，依次划分为 区 至 区 ； 在中时区以西，依次划分为 区 至 区。 东十二 区 和 西十二 区 各跨经度 7.5° 合为一个时区， 称为 东西十二 区 。 中时区 零时区 东一 东十二 西一 西十二 全球共划分 个时区，每个时区跨经度 。 24 15°

18. 相邻两时区相差 小时 东边的时间比西边的时间要 1 东八 Beijing 我国采用 区的区时 （ Time ） 早

19. 时区的划分 东时区 西时区

21. Practice Beijing +3 7 ： 00(P.M.) Doha +8 12 ： 00(A.M.) Washington, D.C. -5 11 ： 00(A.M.) 12.2 12.1 12.1 time zone time date city When did we watch the opening ceremony of the 15th Asian Games ?

22. 1.Calculate the ( 时差 ): If the two places are both in the same eastern or western time zones ,we use to find the time difference ;If one place is in the eastern time zone, and the other is in the western time zone ,we use . 求区时差 : 同 区相 减 ， 异 区相 加 。 conclusion How to calculate the time in different places time difference subtraction addition

23. 2.Calculate the time in one zone: The time in the east is than the time in the west .If we want to calculate the time in the ,we should add the time difference; if we want to calculate the time in the west ,we should the time difference. 求区时：东边的时刻总比西边的时刻 早 。 求 东 边的时刻 加 时差，求 西 边的时刻 减 时差。 earlier east subtract

24. 阿忠在房间打了电话问饭店柜台：“你能告诉我台北和悉尼的时差吗？ " 总机： " JUST A MINUTE .. ." 阿忠回了一句： " THANK YOU " ，然後挂断了电话。 Is it funny ？ Joke What is the time difference between the two cities ？

25. Movie 《 Around the World in 80 days 》 When Fox returned to London ,he thought he had failed （失败） , but the truth is opposite （相反） . Do you know why? The International Date Line

26. 加一天 减一天

27. The argument( 争论 )of the First Sunrise of the New Millennium ( 新 千年 -2000 ) Russia OR New Zealand What was the first country to welcome the first sunrise of the new Millennium (2000)? Do you know why?

28. 加一天 减一天

29. Summary Have you learned some new words and expressions? 时区 -- time zones 时差 -- time difference 国际日期变更线（日界线） The International Date Line 加法 -- addition 减法 -- subtraction

30. 2. How do you calculate the time in other parts of the world? (1). Calculate the . (2). the time difference or the time difference. time difference subtract Add

31. Physical Effects The rotation of Earth has various effects over time, including the Earth‘s shape ， climate , ocean depth and currents , and tectonic forces 。

32. Homework What time is it right now? What time is it in other places? Sydney, Australia Cairo, Egypt London, UK Los Angeles, USA Shanghai, China Monday evening P.M. PLACE DAY TIME

33. Extension Question 小明去美国华盛顿参加会议。根据机票显示飞机从浦东国际机场起飞时间为 上午 10 ： 00 ，预计到达华盛顿时间为 当天下午 17 ： 00 。小明希望回上海时派人来接。如果他乘坐的飞机从华盛顿起飞的时间为 当地时间上午 10 ： 00 ，请问他应该派人什么时候来接机？（ 暂时不考虑飞机延误问题 ）