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Science 3.3


maps that show the features of the earth's surface topographic map
surface features of the earth topography
height above sea level of various island locations elevation
point midway between the highest and lowest tides mean sea level
sea level is measured as 0(where water meets land)
show changes in elevation on the map contour lines
each contour line connects... each point on the map with the same elevation
difference in elevation between 1 contour line and the next contour interval
contour interval in math is range
USGS stands for United states geological survey
ratio to determine true distances compared to map distances scale
topographic sheets = quadrangle
every fifth contour line which is printed darker than thhe others index contour
x marks__________on a map highest elevation
the x on a map is called benchmark
Contour lines spaced widely apart indicate gradual elevation where land is reletively flat
Closed spaced contour lines indicate steep slope
Contour lines almost touching indicate a cliff
Contour lines that bend to form a "v" shape indicate a valley
Contour lines that form closed loops indicate a hilltop
lines that marks a depression hachure lines
Created by: surfergurl