Transcript Topic: 10/5/07 Latitude & Longitude

Topic: Earth’s Coordinate System
How do you find a position on Earth?
Latitude—
20°
N
North
Equator
10°
N
0°
South
10°
S
20°
S
Highest Latitude is 90°N or 90°S
Pole 90°
0°Equator
Longitude –
Prime
Meridian
West
20°W 10°
W
East
0
°
10°
E
20°
E
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.
Know your directions
N
W
E
S
Hemispheres
N
North
West
179°W
North
East
0
0
0
Equator
Prime Meridian
90°
179°E
0
South
South
West
East
90°
S
-ºN, -ºW
-ºN, -ºW
-ºN, -ºW
Take out Best Friend
Map of NYS page 3
-ºN, -ºW
Degrees, Minutes, Seconds
• 360 _______in a circle
• 1 degree is ________
• 1 minute is ________
MUCH more accurate way to find a
location on Earth
Symbols
Degree
Minute
Second
45°
44°30’
44°
43°30
’
43° = 42
°60’
42°30
’
78°3
0’
77°3
0’
76°30’
42
°
75°30’
41°30’
41
°
74°30’
73°30’
40
°
42º30’N, 74º30’W
43°
42°45’
42°30’
42°15’
42°
Albany -°-’N, -°-’W
What about our location?
41°
N
WHB 40°48’N, 72°36’W
40°45’
N
72°W
72°15’W
73°30’W
73°45’W
40°30’
N
Final Question:
• http://www.polleverywhere.com/multiple_c
hoice_polls/LTU3NTYzNDI0/web
Topic: Finding Your Way
Polaris is
the North
Star
Zenith: _________________
Altitude: Angle
above the horizon
Meeting point of earth and sky
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.
Direction to Polaris
Altitude of Polaris= - °
above horizon
North Pole Latitude = -°
Horizon
Altitude of
Polaris = -°
Equator
Latitude = -
°
Horizon
Equator
• Altitude of Polaris =________________
horizon
altitude
Practice…
Polaris
30°
What is the student’s latitude?
Zenith
Polaris
48
°
Horizon
42
°
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 degrees
• The Altitude of Polaris =
__________________________