topic: earth’s coordinate system. how do you find a position on earth?
TRANSCRIPT
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Topic: Earth’s Coordinate System
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How do you find a position on Earth?
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Latitude—
Equator 0°
South
North
20°N
20°S
10°S
10°N
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Highest Latitude is 90°N or 90°S
Pole 90°
0° Equator
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Longitude –
0°20°W 10°W 10°E 20°E
Prime Meridian
West East
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The Prime MeridianThe Prime Meridian
runs through runs through Greenwich, Greenwich, England…England…
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Countries along the Countries along the Prime MeridianPrime Meridian
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What is the greatest longitude line you can have?
_
What is it known as?
_
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You can find coordinates for anywhere on Earth.
You can find coordinates for anywhere on Earth.
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NN
EEWW
SS
Know your directions
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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
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-ºN, -ºW
-ºN, -ºW
-ºN, -ºW
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Take out Best Friend
Map of NYS page 3
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-ºN, -ºW
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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
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SymbolsSymbols
DegreeDegree
MinuteMinute
SecondSecond
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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’
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42º30’N, 74º30’W
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42°
43°
42°30’
42°45’
42°15’
Albany -°-’N, -°-’W
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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
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Final Question:
• http://www.polleverywhere.com/multiple_choice_polls/LTU3NTYzNDI0/web
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Topic: Finding Your Way
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Polaris is the North
Star
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Altitude: Angle above the horizon
Meeting point of earth and sky
Zenith: _________________
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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.
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Equator
Altitude of Polaris= - ° above horizon North Pole Latitude = -°
Altitude of Polaris = -°
Equator Latitude = -
°
---
Horizon
Hori
zon
Hor
izo
n
Direction to Polaris
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• Altitude of Polaris =________________
altitudehorizon
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Practice…
Polaris
30°
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What is the student’s latitude?
42°
48°
Horizon
Polaris
Zenith
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Review… Where are you?
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Review... Where are you?
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*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 = ____________________________________________________