Aim: Why is the coordinate system important?

Aim: Why is the coordinate system important?

Aim: Why is the coordinate system important? Kickoff: Write down everything you know about Latitude: Longitude: Equator: 72 W 42 N 43 N 44 N 43 N 44

N 45 N 73 W 74 W 75 W 76 W 77 W

78 W 79 W 80 W 81 W Can you you Sink my my Battleship?

Cruiser? Aircraft Carrier Battleship Cruiser 46 N 47 N 48 N 49 N Destroyer Submarine How do you describe a coordinate system?

Coordinate system: is a system that uses a grid of imaginary lines to locate any position on earth (Latitude and Longitude) Compass How do we define lines of latitude? Lines of Latitude: distance in degrees north or south of the equator 0 (reference line) Also called parallels (lines that never touch) Equator separates the northern and southern hemisphere Run east to west but are labeled North or South Measure from 90N to 0 to 90S Latitude Fatitude Identify the important Lines of Latitude

Equator = 0 Antarctic Circle = 66.5S Tropic of Cancer = 23.5N North Pole = 90N Arctic Circle = 66.5N Tropic of Capricorn = 23.5S South Pole = 90S How do we label latitude points? Label The following points of latitude: A: 30N

B: 60S C: 15N Which two points are on the same latitude? Latitude Points A and E are on the same latitude at 30N How do we define lines of longitude? Lines of Longitude: distance in degrees east or west of the Prime Meridian (GMT) (reference line) Prime Meridian (0) - passes through Greenwich, England Longitude lines are also called Meridians (meet at the poles)

Run north to south but are labeled East or West Range from 0 180 Lines of Longitude are 15 apart How do we label lines of longitude? 60W 30W 45W 15W Prime Meridian = 0 International Date Line 180

Zig-Zag line (jagged line) 30E 15E 60E 45E 180E 180W One day ahead of west One day behind east How do we label longitude points?

Label The following points of longitude: A: 30W B: 45W C: 30E Which two points are on the same longitude? Longitude Points D and E are on the same longitude at 0 Longitude and Latitude are measured in angular units:

degrees (o) and minutes () o There are 60 minutes in a degree How does the captain teach his crew where theyre going and how long they have? How to locate Polaris? Locate the Big Dipper The pointer stars of the Big Dipper, will point straight to the Little Dippers handle. The first star on the little dipper handle is Polaris (north star). Big Dipper

Pointer Stars Little Dipper How is Polaris viewed from Earth? Altitude how high in the sky (the height of a star) Sextant / Astrolabe device used to find the altitude of star. Polaris altitude equals your latitude! From the North Pole to the Equator: From the Equator to the North Pole: As Latitude decreases,

Altitude of Polaris decreases As Latitude increases, Altitude of Polaris increases A to B: Latitude stays the same, Polaris stays the same Latitude Polaris- the North Star- is located directly over the North Pole. The angle of Polaris above the horizon is the same as the latitude of that point.

70 How does Polaris equal Latitude for New York? Big Dipper Little Dipper 60 50 Polari s 40

Latitude NY = Polaris42N Altitude = 30 20 Pointer Stars 43 10 0 Horizo n 42

70 Determine the Altitude of Polaris at Tampa, Florida? 60 50 40 Latitude Tampa = Polaris30N Altitude = 30 30 Polari

s 20 10 0 Horizo n 70 Determine the Altitude of Polaris at the Equator? 60 Equator: Polaris is at the horizon!

50 40 30 20 10 Polari s 0 Latitude Equator = 0 Polaris Altitude

= 0 Practice Regents Question: Latitude and Longitude Summary Activity Latitude and Longitude Summary Activity Determine the latitude and longitude of the following letters Letter Latitude G 30S

D 15N Determine the Letter by using the following latitude and longitude coordinate Letter Latitude Longitude 0 E 0

150W 45W H 15S 75E Longitude Extra Summary Questions 1. Why is the coordinate system important?

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