# Topic: Earth’s Coordinate System. How do you find a position on Earth?

## Presentation on theme: "Topic: Earth’s Coordinate System. How do you find a position on Earth?"— Presentation transcript:

Topic: Earth’s Coordinate System

How do you find a position on Earth?

Latitude— Equator 0° South North 20°N 20°S 10°S 10°N

Highest Latitude is 90°N or 90°S Pole 90° 0° Equator

Longitude – 0°0° 20°W 10°W10°E20°E Prime Meridian WestEast

The Prime Meridian runs through Greenwich, England…

Countries along the Prime Meridian

What is the greatest longitude line you can have? _ What is it known as? _

You can find coordinates for anywhere on Earth.

N N E E W W S S Know your directions

Hemispheres Prime Meridian Equator North West South West North East South East 179°W00179°E 90 °N 0 90°S

-ºN, -ºW

Take out Best Friend Map of NYS page 3

-ºN, -ºW

Degrees, Minutes, Seconds 360 _______in a circle360 _______in a circle 1 degree is ________1 degree is ________ 1 minute is ________1 minute is ________ MUCH more accurate way to find a location on Earth

Symbols Degree Minute Second

41°30’ 42° 40° 41° 43° = 42 °60’ 42°30’ 44° 44°30’ 45° 43°30’ 74°30’ 76°30’ 75°30’ 73°30’ 77°30’ 78°30’

42º30’N, 74º30’W

42° 43° 42°30’ 42°45’ 42°15’ Albany -°-’N, -°-’W

What about our location? 41° N 40°30’N 72°W72°15’W 40°45’N 73°30’W WHB 40°48’N, 72°36’W 73°45’W

Final Question: http://www.polleverywhere.com/multiple_c hoice_polls/LTU3NTYzNDI0/webhttp://www.polleverywhere.com/multiple_c hoice_polls/LTU3NTYzNDI0/web

Polaris is the North Star

Altitude: Angle above the horizon Meeting point of earth and sky Zenith: _________________

How to Find the North Star You can find the North Star by locating the two bowl stars of the Big Dipper. Follow those stars in a straight line to the first bright star you see. That is Polaris.

Equator Altitude of Polaris= - ° above horizon North Pole Latitude = - ° Altitude of Polaris = -° Equator Latitude = -° --- Horizon Direction to Polaris

Altitude of Polaris =________________ altitude horizon

Practice… Polaris 30°

What is the student’s latitude? 42° 48° Horizon Polaris Zenith

Review… Where are you ?

Review... Where are you?

*Summary* Latitude is the measure of how far North or South of the Equator a location is, measured in degreesLatitude is the measure of how far North or South of the Equator a location is, measured in degrees The Altitude of Polaris = __________________________The Altitude of Polaris = __________________________

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