🪐intro to astronomy review

key term - Bar

Definition

A bar is a unit of pressure defined as 100,000 pascals. It is commonly used in atmospheric science to measure atmospheric pressure.

5 Must Know Facts For Your Next Test

  1. 1 bar is approximately equal to the average atmospheric pressure at sea level on Earth.
  2. Atmospheric pressure decreases with altitude, meaning there are fewer bars at higher elevations.
  3. The term 'millibar' (mbar) is often used in meteorology and equals one-thousandth of a bar.
  4. Standard atmospheric pressure is often approximated as 1.01325 bars.
  5. Instruments called barometers are used to measure atmospheric pressure in bars or millibars.

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