Answer:
iso·bar ˈī-sə-ˌbär. 1. : an imaginary line or a line on a map or chart connecting or marking places of equal barometric pressure. 2. : one of two or more atoms or elements having the same atomic weights or mass numbers but different atomic numbers.
Explanation:
Isobars are lines on a weather map joining together places of equal atmospheric pressure. On the map the isobar marked 1004 represents an area of high pressure, while the isobar marked 976 represents an area of low pressure.
