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Latitude & Longitude – How they work Any Material in BLUE should be copied down

Learn how latitude and longitude work together to form a grid system on the globe, aiding in location identification and time zone division. Discover the significance of lines of latitude and longitude, equator, prime meridian, International Date Line, and more as key components of navigating our planet. Explore the impact of Earth's tilt on seasons and understand important dates such as solstices and equinoxes.

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Latitude & Longitude – How they work Any Material in BLUE should be copied down

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  1. Latitude & Longitude –How they workAny Material in BLUE should be copied down

  2. These lines work together to form a grid system on the globe which helps us to locate different places Latitude: Lateral (lines from East to West – “fatitude”) Longitude: Lines from North to South Page 44 of your atlas – find the approximate location of Penticton Answer = 49.3N 119.35W

  3. The other purpose of these lines is to divide the globe into time zones (specifically done by lines of longitude).

  4. Find the time difference if it is noon on Wednesday in Penticton (pg. 28 in your atlas) • Vancouver, BC = • Greenwich, UK (time zone “Z”) = • Sydney, AUS (time zone “K”) = • Toronto, ON (time zone “R”) = Noon, Wednesday 8pm, Wednesday 6am, Thursday 3pm, Wednesday

  5. LINES OF LATITUDE Above Equator, Below Arctic Circle The Tropics Below Equator, Above Antarctic Circle Both Tropics mark the boundary of where the sun could be directly overhead at noon during certain times of the year. 1 of the 5 “Great Circles”

  6. These lines run horizontally around the globe, parallel to each other.

  7. There are approximately 111km between each degree of latitude.

  8. The longest of these lines is the EQUATOR, which circles the exact middle of the globe

  9. It is one of the GREAT CIRCLES as it encompasses the circumference of the Earth

  10. Lines of latitude circle the globe at varying degrees NORTH and SOUTH of the equator. The lines are also given numbers measured in degrees. Equator = 0o North Pole = 90o N South Pole = 90o S Tropic of Cancer = 23.5o N Tropic of Capricorn = 23.5o S

  11. LINES OF LONGITUDE

  12. All lines of longitude have two things in common: -They run through both the North and South Poles -They are all GREAT CIRCLES

  13. Lines of Longitude are NOT parallel to each other, however, like latitude, they are numbered in degrees and measured EAST and WEST of the PRIMEMERIDIAN at 0o

  14. Prime Meridian My Uncle Patrick at the Prime Meridian in Greenwich

  15. Opposite of the prime meridian is the INTERNATIONALDATELINE running through 180o. This line allows for the change in time zones and exists as an agreed point that the day changes when you travel over it.

  16. When crossing the International Date Line going WEST you advance one day.

  17. When crossing the International Date Line going EAST you go back one day.

  18. The Earth rotates fully every 24hours. Each of the 24 meridians equals one hour of time (150).

  19. Let’s draw all of those on our “globe”… • On your Balloons-Draw: • 24 meridians • Equator • International Dateline

  20. The tilt of the globe and seasons…

  21. The Earth tilts at an angle of 23.5o

  22. Due to this tilt, the sun’s rays shine more directly on either the Northern or Southern hemispheres, giving us different seasons

  23. Only the area of the Earth between the Tropics of Cancer and Capricorn receive direct sunlight all year.

  24. IMPORTANT DATES • June 21st - SummerSolstice (longest day of the year for N Hemisphere) • September 23rd - AutumnalEquinox (equal day and night) • December 21st or 22nd - WinterSolstice (shortest day of the year for N Hemisphere) • March 21st - VernalEquinox (equal day and night)

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