Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish...
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Transcript of Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish...
![Page 1: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/1.jpg)
Chapter 3 – Models of the Earth
![Page 2: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/2.jpg)
Section 3.1Finding Locations on Earth
Objectives
Distinguish between latitude and longitude.
Explain how latitude and longitude can be used to locate places on Earth’s surface.
Explain how a magnetic compass can be used to find direction on Earth’s surface.
![Page 3: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/3.jpg)
EARTH REFERENCE POINTS
• AXIS OF ROTATION• NORTH POLE• SOUTH POLE• EQUATOR• NORTHERN
HEMISPHERE• SOUTHERN
HEMISPHERE
![Page 4: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/4.jpg)
LATITUDE
• The angular distance north or south of the equator. This set of circles are called parallels because they run east and west parallel to the equator
![Page 5: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/5.jpg)
DEGREES OF LATITUDE
• Measured and labeled as being north (N) or south (S) of the equator (0°)
• Degree - 111 km (1/360th of Earth’s circumference).
• Maximum values are at the geographic poles (90°N and 90°S).
![Page 6: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/6.jpg)
Minutes and Seconds
• Degrees can be further subdivided:
1° = 60 minutes (60')
1' = 60 seconds (60")
Astrolabe – Early InstrumentUsed To Determine Latitude
![Page 7: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/7.jpg)
LATITUDE IN 1300’S
![Page 8: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/8.jpg)
LONGITUDE• East-west locations
established by using meridians, semi-circles that run from pole to pole.
• Prime Meridian (0°) runs through Greenwich, England.
• Longitude is the angular distance, measured in degrees, east or west of the prime meridian.
![Page 9: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/9.jpg)
Degrees of Longitude
• The meridian opposite the prime meridian is labeled 180°.
• All locations east of the prime meridian have longitudes between 0° and 180°E, those west between 0° and 180°W.
• Can also be subdivided into minutes and seconds.
![Page 10: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/10.jpg)
Distance Between Meridians
• The only place on the earth where 1° of longitude equals 111 km is at the equator. Why?
• All meridians (lines of longitude) meet at the poles, so the distance measured by a degree of longitude decreases as you move from the equator toward the poles.
![Page 11: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/11.jpg)
LATITUDE & LONGITUDE(We Make A Grid To Tell Location)
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WHERE ARE WE?(Latitude Comes First, Then
Longitude)• Fall City - 47o33'59"N, 121o54'08"W
• North Bend - 47o29'45"N, 121o47'19"W
• Snoqualmie - 47o31'27"N, 121o49'03"W
![Page 13: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/13.jpg)
Great Circles
• Any circle that divides the globe into halves.
• Often used in navigation, especially by aircraft.
• Shortest distance between any two points on a sphere.
On a map a GC is curved, ona globe it is a straight line.
![Page 14: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/14.jpg)
Finding Direction
• One way is to use a magnetic compass. This is because of the earth’s magnetosphere.
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Geomagnetic Poles
• The earth acts like it had a giant bar magnet inside it. It is tilted relative to the geographic poles.
• A compass needle points to the geomagnetic pole.
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Magnetic Declination
• The angle between a compass reading and true north, measured in degrees east or west of the direction of the geographic North Pole. A compass reading is only accurate along the line of 0° magnetic declination.
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Polar Wander
• The geomagnetic pole, over time, changes position. Today it is slightly west of Ellesmere Island (Canada).
![Page 18: Chapter 3 – Models of the Earth Section 3.1 Finding Locations on Earth Objectives Distinguish between latitude and longitude. Explain how latitude and.](https://reader033.fdocuments.in/reader033/viewer/2022061610/56649ee15503460f94bf135e/html5/thumbnails/18.jpg)
The Global Positioning System (GPS)
• A global network of 24 satellites. Radio signals from 3 satellites allow a GPS receiver to calculate the latitude, longitude, and altitude of the receiver. Accurate to ±15 meters.
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ASSIGNMENT
Outlining ReviewSection Outline 3:13.1 Key Terms3:1 Directed Reading
Worksheet