Lesson 5Lesson 5

SPACESHIP EARTH:SPACESHIP EARTH:

A New Journey Each Day and YearA New Journey Each Day and Year

Foucault Pendulum 傅科摆

What did this experiment 试验 prove?

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.

Earth’s Rotation Earth’s Rotation 地球的自转

What’s the What’s the physical effectphysical effect ( ( 对自然界的影响对自然界的影响))

of Earth’s rotation?of Earth’s rotation?

Night and Day

Night and Day

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

the opening ceremony of the 15th the opening ceremony of the 15th Asian Games Asian Games

lighting the Games’ flame (lighting the Games’ flame ( 圣圣火）火） during the opening ceremony of during the opening ceremony of

the 15th Asian Games the 15th Asian Games

1212 　　 A.MA.M ．．Dec.2Dec.2 　　

Different places have time

We call the difference .( 时差 )

time difference

Why did we have to stay up late Why did we have to stay up late 熬夜熬夜 for the football match and for the football match and the opening ceremony of Asian the opening ceremony of Asian

Games at midnight?Games at midnight?

Different

Video

Time ZonesTime Zones （（时区时区））

80

Time ZonesTime 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°

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

时区的划分时区的划分

东时区西时区

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 datecity

When did we watch the opening ceremony of the 15th Asian Games ?

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。

time difference

subtraction

addition

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。

earliereast

subtract

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 ？

What is the time difference between the two cities ？

《 Around the World in 80days 》

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

加一天

减一天

The argument(The argument( 争论争论 )of the First )of the First Sunrise of the New MillenniumSunrise of the New Millennium

(( 新新千年千年 -2000-2000))

Russia OR New Zealand

What was the first country to welcome the first sunrise of the new Millennium (2000)?

Do you know why?

加一天

减一天

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

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

subtractAdd

Physical EffectsPhysical Effects

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

Sydney, Australia

Cairo, Egypt

London, UK

Los Angeles, USA

Shanghai, China Monday evening P.M.

PLACEDAYTIME

What time is it right now?What time is it in other places?

ExtensionExtensionQuestionQuestion

　　　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）