introductory unit gr 6 ppt lesson 6
DESCRIPTION
Unit 1 lesson 6 PPT "Global Streets"TRANSCRIPT
SPACESHIP EARTH:
A New Journey Each Day and Year
Lesson 6
Léon Foucault
What did this experiment prove?
Earth Rotation
地球的自转
Direction:
From West
To East Counterclockwise 逆时针
Night and Day
Different places have timeDifferent We call the difference
time difference 时差
时区
MAP-READING
longitude difference: 1°, time difference: 4min
longitude difference: 15°, time difference: 1 h
Time Zones 时区
时区的划分东时区西时区
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。
Time Zones
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。
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
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 .
time difference
subtraction
addition
ConclusionHow to calculate the time in different places
同减异加
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.
earlier
east
subtract
东加西减
Do you know why?
1519年麦哲伦船队向西作环球航行,于 1522年完成环球航行一周回到西班牙时,当地的日历上是9月 8日,而水手们每天记录的航海日记上却是 9月 7日。怎么会丢失一天呢?The International Date Line
加一天
减一天
算时差两地相差几个时区,区时就相差几个小时
计算时东正西负,东边的时区减去西边的时区
0°
计算西五区与东二区的时差
2-(- 5)= 7两地时差为 7小时
Practice
算具体时刻(已知一个时区的区时,求另一个时区的区时)
1. 计算两个时区的时差
2. 根据东加西减(右加左减,和数轴一样)时差已知东京时间(东九区)为5月1日12: 00,求伦敦(中时区)的区时?时差: 9- 0= 9
区时: ∵伦敦在东京的西面
∴12- 9= 3
当美国纽约(西五区)是 10月 27日19: 15时,东八区的区时是多少?
时差: 8-(- 5)= 13
区时:(东加西减)
19+ 13=32
所以东八区的区时是 10月 28日 8:15
The Earth is one of nine planets that orbit the Sun. Together they make up our Solar System.
地球的公转
January
July
SUMMARY
Answers
The X shows where SPIDERMAN lives. Is it day or night?
Explain your answer_____________________________________________
This part of the
Earth is facing the direct
light of the sun.
New Words Coming Up!
时区
时差
国际日期变更线(日界线)
加法
减法
time zones
time difference
The International Date Line
addition
subtraction