topic: earth’s coordinate system. how do you find a position on earth?
Post on 03-Jan-2016
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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 = ____________________________________________________
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