| Air Mass: |
A large body of air with the uniform temperature and humidity of its source region. |
| Anticyclone: |
A large area of high atmospheric pressure, characterized by outward-spiralling winds. A HIGH. |
| Atmospheric Pressure: |
The force exerted by the atmosphere's weight on a surface of unit area. |
| Climate: |
The long-term average weather of a region. |
| Cyclone: |
A large area of low atmospheric pressure, characterized by inward-spiralling winds. A LOW. |
| Front: |
The surface between two different air masses. |
| High: |
The centre of an area with high atmospheric pressure. |
| Humidity: |
The amount of water vapour in the air. |
| Isobar: |
A line through points of equal atmospheric pressure. |
| Low: |
The centre of an area with low atmospheric pressure. |
| Polar Front: |
The surface between polar and tropical air masses, along which cyclonic disturbances form. |
| Synoptic Chart: |
A map depicting the weather in an area at a given moment. |
| Wave Cyclone: |
A storm or low-pressure centre that moves along a front. |
