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Today’s Objective:

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By the end of this lesson I will analyze Why are Latitude and Longitude Lines Used?

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Think about it . . . If I wanted to move the projector attached to the ceiling to line up with “X” on the ceiling, how could I describe this new position to the technology person?

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  • cartographer – a person who makes maps
  • lines of latitude – imaginary lines that run east to west and help us find exact locations
  • lines of longitude – imaginary lines that run north to south and help us find exact locations
  • hemisphere – half of Earth
  • Equator – imaginary line of latitude that circles the Earth east to west
  • Prime Meridian – imaginary line of longitude that runs north to south at zero degrees
  • relative location – identifying a location based on other locations
  • absolute location – an exact location – can use coordinates or street addresses
  • coordinates – coordinates mark exact locations on Earth, ex. 50 degrees North, 37 degrees East

Vocabulary

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Latitude

  • Imaginary lines which run horizontal

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  • Measures distances north and south of the Equator

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  • Range from 0o to 90o

*Important Vocabulary*

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Longitude

  • Imaginary lines which run vertically through the poles

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*Important Vocabulary*

  • Measures distances east and west of the Prime Meridian

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  • Ranges from 0o to 180o

* Prime Meridian (0o) and the International Date Line (180o) are the same line *

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  • Lines of latitude and longitude are measured in degrees.

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  • To be more precise you can break a degree into minutes and seconds

Calculating Precise Locations

One degree is divided into 60 minutes (60’)

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One minute is divided into 60 seconds (60”)

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  • For example – 63O11’34” N

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NOW TRY THESE . . .

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What is the latitude and longitude of . . .

  1. Point A – __________________________
  2. Point B – __________________________
  3. Point C – __________________________
  4. Point D – __________________________
  5. Point E – __________________________

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  1. Give the latitude and longitude of Mt. Marcy

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  • Give the latitude and longitude of Plattsburgh

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  • Place an X at �44o30’ N and 73o30’ W

Using degrees and minutes,

** Round to the nearest 15’ **

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Estimate the location of city

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F = 30OS, 135OE

E = 0, 90OE

D = 60ON, 90OE

C = 30OS, 30OE

B = 30OS, 60OW

A = 60ON, 120OW

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Estimate the location of each point

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