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°20°W 10°W 10°E 20°E

Prime Meridian

West East

The Prime MeridianThe Prime Meridian

runs through runs through Greenwich, Greenwich, England…England…

Countries along the Countries along the Prime MeridianPrime Meridian

What is the greatest longitude line you can have?

_

What is it known as?

_

You can find coordinates for anywhere on Earth.

You can find coordinates for anywhere on Earth.

NN

EEWW

SS

Know your directions

Hemispheres

Prim

e Meridian

Equator

North

West

South

West

North

East

South

East

179°W 0 0 179°E

90°N

0

0

90°S

-ºN, -ºW

-ºN, -ºW

-ºN, -ºW

Take out Best Friend

Map of NYS page 3

-ºN, -ºW

Degrees, Minutes, Degrees, Minutes, SecondsSeconds

• 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 MUCH more accurate way to find a location on Earthlocation on Earth

SymbolsSymbols

DegreeDegree

MinuteMinute

SecondSecond

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°W

72°1

5’W

40°45’N

73°3

0’W

WHB 40°48’N, 72°36’W

73°4

5’W

Final Question:

• http://www.polleverywhere.com/multiple_choice_polls/LTU3NTYzNDI0/web

Topic: Finding Your Way

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

Hori

zon

Hor

izo

n

Direction to Polaris

• Altitude of Polaris =________________

altitudehorizon

Practice…

Polaris

30°

What is the student’s latitude?

42°

48°

Horizon

Polaris

Zenith

Review… Where are you?

Review... Where are you?

*Summary**Summary*

• Latitude is the measure of how Latitude is the measure of how far North or South of the far North or South of the Equator a location is, measured Equator a location is, measured in degreesin degrees

• The Altitude of Polaris = The Altitude of Polaris = ____________________________________________________