What are isobars?

Question

What are isobars?

Answer 1

An isobar is a line of equivalent atmospheric pressure found on any kind of a weather map or chart.

Answer 2

Isobars are lines of constant/same pressure.

Answer 3

iso = same

bar = pressure

They are lines along a meteorological map that indicate a constant air pressure.  Like height lines on a topographical map of a hill.  So, if air pressure decreases across a surface, there will be isobars along that surface indicating that at different points, the pressure is going down or up.

Answer 4

Lines of equal pressure on a weather chart....