Ch. 3 NotesModels of the Earth

Latitude

Run east and west (left and right)

90° above equator, 90° below equator

Equator is at 0°

LatitudeA degrees is divided into 60 minutes (’) and minutes are divided into 60 seconds (”)

Helps determine a precise location

Like a precise time—3 hours, 2 minutes, 43 seconds

Washington, D.C., is located at 38°53’23”N

N is for north of equator

Longitude

Run north and south (up and down)

Longitude hint: Think long person!

Prime meridian is 0° longitude

Located in Greenwich, England

Also International Date Line

Longitude

180° east of prime meridian, 180° west of prime meridian

Like latitude, for longitude a degree is dividing into 60 minutes and 60 seconds

Washington, D.C. is 77°00’33”W

W means west of prime meridian

D.C’s full location is 38°53’23”N, 77°00’33”W

EXTRA CREDIT!Determine the latitude and longitude of your house

HINT: Use the Internet!Google Maps, maybe?

Include the degrees, minutes, seconds

Turn in tomorrow on piece of paper with your name, address, and latitude /longitude!

Remote Sensing

Satellites or airplanes capture images of Earth to help develop maps

Google Earth!

NASA

Maps can display other info, like temperature, moisture, plant life, etc.

Video – What is Remote Sensing?

Grand Canyon image from Landsat 7

Parts of MapDirection

Usually shown by a compass indicating N, S, E, W

LegendIndicates different symbols on map, what they stand for

Parts of MapMap Scale

Shows relationship between distance on map and actual distance

Ex. 1 inch = 1 mile

Different Types of Maps

Geologic mapsRegular maps that are color-coded to show different types of rock in the area

Soil mapsRegular maps that are color-coded to show different types of soil in that area

Helpful for agriculture!

Topographic MapShow elevation, height above sea level

Each line (contour interval) below represents another 10 meters in height as you move toward middle

Video – Topographic Maps