# Latitude & Longitude - How they work

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

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

Find the time difference if it is noon on Wednesday in Penticton (pg. 28 in your atlas) Vancouver, BC = Noon, Wednesday

Greenwich, UK (time zone Z) = 8pm, Wednesday Sydney, AUS (time zone K) =

6am, Thursday Toronto, ON (time zone R) = 3pm, Wednesday

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

There are approximately 111 km between each degree of latitude. The longest of these lines is the EQUATOR, which circles the exact middle of the globe

It is one of the GREAT CIRCLES as it encompasses the circumference of the Earth 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 North Pole South Pole Tropic of Cancer

Tropic of Capricorn = = = = =

0o 90o N 90o S 23.5o N 23.5o S

LINES OF LONGITUDE All lines of longitude have two things in common: -They run through both the North and South Poles -They are all GREAT CIRCLES each other, however, like latitude, they

are numbered in degrees and measured EAST and WEST of the PRIME MERIDIAN at 0o Prime Meridian My Uncle Patrick at the Prime

Meridian in Greenwich Opposite of the prime meridian is the INTERNATIONAL DATE LINE 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. When crossing the International Date Line going WEST you advance one day. When crossing the International Date Line going EAST you go back one day.

The Earth rotates fully every 24 hours. Each of the 24 meridians equals one hour of time (150). Lets draw all of those on our globe

On your Balloons-Draw: 1. 24 meridians 2. Equator 3. International Dateline The tilt of the globe and seasons

The Earth tilts at an angle of 23.5o Due to this tilt, the suns rays shine more directly on either the Northern or Southern hemispheres, giving us different seasons

Only the area of the Earth between the Tropics of Cancer and Capricorn receive direct sunlight all year. IMPORTANT DATES June 21st

Summer Solstice (longest day of the year for N Hemisphere) September 23rd Autumnal Equinox (equal day and night) December 21st or 22nd - Winter Solstice (shortest day of the year for N Hemisphere) March 21st

Vernal Equinox (equal day and night)

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