Isolines - Earth Science

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What do all points on an isoline have in common?

Same value

Name several other field quantities that might be measured through out the region

Snow depth, air pressure, pollution

Isoline

a line connecting points of equal value

Slope/Gradient

a measure of the steepness of a line

Topographic (Contour) Map

shows the shape of Earth's surface

contour interval

the difference in elevation between one contour line and the next

Isolines should always be drawn in _____ first to allow for revisions

Pencil

Isolines are curved and/or smooth with ____ Sharp turns or corners

No

Isolines never _________

Cross one another

Isolines tends to ________ one another

Parallel

Isolines never end so they should be drawn to the ______ of the map unless they form a ______

Edge, Loop

isolines connect points of ______ _______

Equal value

isolines are drawn according to a designated isoline ________ (on a topographic amp this is called the ___________ ________)

Interval, contour interval

What is special about the isolines that we know as contour lines? (How do they differ from other isolines?)

Lines that connect points of equal elevation, sharp turns and depressions (Hachured contour line)

Isolines May but do not have to form a closed _____

Loop

Values on one side of an isoline are _______ while all values on the other side are ________

Lower, higher

Do isolines ever end except at the edge of the map?

No

Does every isoline have one side where the numbers are high and the other where the numbers are low?

Yes

Is the interval from one isoline to the next on any one map always the same?

Yes

Isobars

connect points of equal air pressure

Isotherms

connect points of equal temperature


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