Allentown
37° F
Mostly Cloudy
Mostly Cloudy

What are the lines and numbers on a surface map?

Published On: Jul 26 2011 11:54:24 AM CDT

21881280

The lines on a surface map are called isobars.

Isobars are lines of constant pressure which are measured in units called millibars.

The numbers indicate the amount of air pressure, in millibars, that each line represents.

These lines and numbers are necessary find out exactly where High and Low pressure systems are on the maps.

ยป More Homework Help Questions