# Longitude and Time - PowerPoint PPT Presentation

Longitude and Time

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Longitude and Time

## Longitude and Time

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##### Presentation Transcript

1. Longitude and Time

2. Solar Noon Solar Time – Solar Noon – Sunrise Sunset

3. Review Longitude Lines

4. Do students in California get up when you get up for school?

5. Time = Longitude!!

6. Earth’s Rotation • Earth Rotates ___oin 24 hours • 360o/24hrs = __oper hour

7. Standard Time Zones What is the amount of time difference between each time zone? • 1 hour • Every 15o longitude is a new time zone. • How many time zones are there? • 24 hours in one day… there are 24 time zones!

8. Map of 24 Hour Time Zones

9. Determining Longitude

10. 1st: -

11. A chronometer is a clock set to the local time at Greenwich, just outside of London.

12. 3rd: Multiply by -0/hr

13. 4th:- • If GMT is later in the day compared to local time – you are west • If GMT is earlier in the day compared to local time - you are east

14. East sees daylight first! West last to see daylight! Prime Meridian Sun

15. Example 1 • GMT = 2 pm • Local Time = 12 noon • What is your longitude? 2 hours*15° = 30° 2pm is later in the day than 12 noon - 30°W

16. Prime Meridian 2pm 12pm The Prime Meridian is later in the day than local time.

17. GMT = 8 am • Local Time = 12 noon • What is your Longitude?

18. Final Question • GMT = 10 pm • Local Time = 12 noon • What is your Longitude? http://www.polleverywhere.com/multiple_choice_polls/NTc3NDc4NTY1/web

19. Final Question • GMT = 10 pm • Local Time = 12 noon • What is your Longitude? -* -° =-° -