Earth Science Vocab Ch 3

Front 1

parallels

Back 1

one set of circles decribes positions north and south of the equator

Front 2

latitude

Back 2

the angular distance north and south of the equator

Front 3

meridians

Back 3

used to est. east-west locations

Front 4

prime meridian

Back 4

one meridian was slected to be0 degrees which passes through Greenwich, England

Front 5

Longitude

Back 5

angular distance, measured in degrees, east or west of the prime meridian

Front 6

great circle

Back 6

any cirlce that divids the globe into halves

Front 7

geomagnetic poles

Back 7

the points on the earths surface just above the poles of the imaginay magnet

Front 8

magnetic declination

Back 8

angle between the direction of the geographic pole and direction in whichthe compass needle points to

Front 9

true north

Back 9

the direction of the geographic north pole

Front 10

cartography

Back 10

science of map making

Front 11

map projection

Back 11

flat map the represents the 3-D curved surface of a globe.

Front 12

mercator, gnomic, conic projections

Back 12

3 types of map projections neither is 100% correct

Front 13

polyconic projections

Back 13

series of conic projections may be used to map a number of neighboring areas, each one touces the globe at a slightly different attitude.

Front 14

legend

Back 14

symbols explained on a map

Front 15

scale

Back 15

indicates th relationship between distance as shown on a map and actual distance

Front 16

topographic map or topogaphy

Back 16

type of map that is escpecially useful in earth science

Front 17

elevation

Back 17

height above sea level

Front 18

main sea level

Back 18

the point midway between the highest and lowest tide levels of the oceans

Front 19

contour lines

Back 19

used to show elevationon topographic maps

Front 20

contour interval

Back 20

the difference between one contour line and the next

Front 21

relief

Back 21

the difference between the highest and lowest points of the area being mapped

Front 22

index contours

Back 22

every fifth contour line is printed bolder to make reading the map easier

Front 23

depression contours

Back 23

lines that are drawn along the inside of the loop and point toward its center, indicating the direction of the depression