1. Locations on Earth
Created By:
Mr. Kreeger

2. Homework and Page References
Page in text
_______________________________________ HW
#1- Do problems 1-5 on page 114
# 2- Handouts if not finished in class

3. Table of Contents Latitude Longitude Finding Locations Time zones
Practice finding locations
Time zones
Determining time with longitude
Practice telling time with longitude
Determining latitude with the Polaris (The North Star)

4. Introduction Video

5. 1. Latitude Latitude- Angular distance N & S of equator
Sets of circles that are north and south of equator
Parallels-The lines that run East and West around the world parallel to equator
Latitude- Angular distance N & S of equator
Highest latitude= 90 N (North Pole)
Lowest Latitude = 90 S (South Pole)
Middle of all Latitudes = 0 (Equator)

6. 1. Latitude How many degrees are there in a circle?
What is the distance to either pole?
1 degree of latitude= 111km, 68.9 miles
Each degree of latitude has 60 equal parts called minutes. (How long is 1 minute?)
Each minute of latitude has 60 equal parts called seconds. (How long is 1 second?)

7. 1. Latitude (Degrees, minutes, seconds)

8. 2. Longitude
Sets of circles that are east and west of the Prime Meridian
Meridian- The lines (semi-circles) that run north and south from pole to pole.
Longitude- The angular distance E & W of the Prime Meridian.
Highest Longitude = 180 (International Date line)
Lowest Longitude = 0 (Prime Meridian Greenwich England)

9. 2. Longitude
The distance covered by a degree of longitude depends on where the degree is measured. WHY????????

10. 2. Longitude
At equator=0 degrees latitude=1 degree of longitude is equal to 111km.
At 60N, 1 degree of longitude is equal to 55km.
At 80N, 1 degree of longitude is equal to 20km.

11. How to find locations

12. 3. Finding Locations
In order to find any location on the earth you need to find the point where the latitude and longitude cross each other.
Latitude- Measured in degrees north and south from 0(Equator) to 90N (North Pole) 90S (South Pole)--> Always said first
Longitude- Measured in degrees east and west from 0(Prime Meridian) to 180 (International Date Line) Always said second

13. Poll: The location of Slide Mountain is
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Poll: The location of Slide Mountain is

14. Poll: Which latitude and longitude coordina...
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Poll: Which latitude and longitude coordina...

15. Poll: Approximately what are the coordinate...
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Poll: Approximately what are the coordinate...

16. Practice finding Locations
Locations in the USA
Map of USA
Locations in the World
Map of the World

17. Time Zones
Earth has 24 time zones, each one is 15 degrees of longitude (why)???
This means the Earth rotates at 15 degrees per hour so 15 degrees/hour X 24 hours = 360 degrees

18. Determining time using Longitude
12:00 pm- Sun is highest in sky
Occurs at different times, at different locations--> Earth is spinning
0 degrees longitude- Prime Meridian center of all longitudes
Can determine time based on how many degrees east or west you are from the prime meridian

19. Determining Time using Longitude cont…
To figure out what time it is follow these steps:
Determine what time it is at Greenwich England (0 degrees longitude)
If you are East of 0 degrees longitude the time will be ahead 1 hour for every 15 degrees of longitude an observer moves.
If you are West of 0 degrees longitude the time will be behind 1 hour for every 15 degrees of longitude an observer moves
Remember if you move East time goes Ahead if you move West time goes Back

20. Practice telling time with Longitude
If the time at Greenwich England is 2:00 am what time is it 75 W longitude.
If the time at Greenwich England is 12:00 am what time is it 105 E longitude
If the time is 3:00 pm at 30 W longitude what time is it at 60 E longitude.

21. Determining Latitude using Polaris (The North Star)
The latitude of any location north of the equator is equal to the altitude of the north star:
Ex: New York City (Latitude = 40 N, altitude of the North Star = 40 degrees above horizon)

22. Poll: What could be the approximate locatio...
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Poll: What could be the approximate locatio...

23. Poll: At which laitdue will POLARIS be over...
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Poll: At which laitdue will POLARIS be over...

24. Poll: To an observer on a ship at sea, at w...
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Poll: To an observer on a ship at sea, at w...

25. Poll: What is the differnece in mean solar ...
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Poll: What is the differnece in mean solar ...

26. Poll: As a person travels due west across N...
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Poll: As a person travels due west across N...

27. Poll: At which New York State location is t...
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Poll: At which New York State location is t...