Presentation on theme: "A Typical Graph This is an example of a typical graph we are all familiar with. The graph is made up of different “points” with lines that connect."— Presentation transcript:
A Typical Graph This is an example of a typical graph we are all familiar with. The graph is made up of different “points” with lines that connect the points.
A Typical Graph Each point has two values indicating place: The “X” value that runs along the horizontal “X” axis The “Y” value that runs along the vertical “Y” axis Y axis X axis
A Typical Graph X value is always stated first, followed by the Y value The “origin” is the point where the two axes intersect with a value of (0,0) (0,0) (3,8) Y X (9,5)
Typical Graph A point can also have a negative (-) value Negative X values are to the left of the origin (0,0) Negative Y values are below the origin X Y (-X,+Y) (+X,-Y) (+X,+Y) (-X,-Y) (0,0)
East West, North South on the Earth The X axis is the equator. The Y axis is the prime meridian that runs through Greenwich, England. Lat/Long are the two grid points by which one can locate any point on Earth. Y X
East West, North South on the Earth Let each of the four quarters (quadrants) then be designated by North or South and East or West. N S EW
East West, North South on the Earth The N tells us we’re north of the equator. The S tells us we’re south of the equator. The E tells us that we’re east of the prime meridian. The W tells us that we’re west of the prime meridian. (N, W) (N, E) (S, W) (S, E)
East West, North South on the Earth All points in North America will have a North latitude and a West longitude because it is North of the equator and West of the prime meridian. (N, W) Prime Meridian
East West, North South on the Earth What would be the latitude and longitude directions in Australia? Prime Meridian ? If you said South and East, you’re right!
What is Latitude? Latitude is the distance from the equator along the Y axis. All points along the equator have a value of 0 degrees. North pole = 90°N South pole = 90°S All values are in stated in degrees. Y X 90°S 90°N
What is Latitude? Each degree of latitude is divided into 60 minutes. Each minute is divided into 60 seconds. Y X 90°S 90°N This is also true of longitude.
What is Latitude? For example, 40° 02’ 51’’N This is close to the latitude where you live. Y X 90°S 90°N
And Longitude? Longitude is the distance from the prime meridian along the X axis. All points along the prime meridian have a value of 0 degrees longitude. Earth is divided into two parts, or hemi- spheres, of east and west longitude. Y X 180°W 180°E
Meridians and Parallels? Earth is divided into 360 equal N-S slices (meridians) -180 west and 180 east of the prime meridian Earth is divided into 180 equal E-W slices (parallels) -90 north and 90 south of the equator Y X 180°W 180°E
Meridians and Parallels? Meridians of longitude run N and S, but are used to measure E and W. Parallels of latitude run E and W, but are used to measure N and S
What is our location? Central Peoria’s latitude and longitude are approximately: 40°, 44’, 24’’N 89°, 36’, 36’’W Y X 90°S 90°N
So Where is (0,0)? The origin point (0,0) is where the equator intersects the prime meridian. Point (0,0) is off the western coast of Africa in the Atlantic Ocean.
In which quadrants are the following latitudes and longitudes? 1. 41°N, 21°E 2. 37°N, 76°W 3. 72°S, 141°W 4. 7°S, 23°W 5. 15°N, 29°E 6. 34°S, 151°E AB C D
Let’s see how well you did... 1. B 2. A 3. C 4. C 5. B 6. D
Equator Latitude 0 o Latitude: (90 o N to 90 o S) Latitude 23½ o NorthTropic of Cancer Latitude 23½ o South Tropic of Capricorn Longitude 30 o East Longitude 60 o East Longitude 30 o West Longitude 60 o West Positioning on the Earth’s Surface East is the direction of rotation of the Earth North Pole South Pole 23½ o 66½ o 90 o 90 0 21 st June 22 nd December 22 nd Sept 20 th March 30 o E 60 o E90 o E 90 o W 30 o W 60 o W Longitude 90 o East Longitude 90 o West Prime Meridian 0 o Longitude Longitude: (180 o E to 180 o W) Latitude and Longitude together enable the fixing of position on the Earth’s surface.
Now you are ready to find some locations on a map!