| A | B |
|---|
| aerovane | a device like a wind mill to detect wind speed and directon |
| anemometer | an instrument used to determine wind speed |
| barometer | is an instrument used to measure atmospheric pressure |
| anticyclone | s a weather phenomenon in which there is a descending movement of the air and a high pressure area over the part of the planet's surface affected by it |
| convergence | the condition that exists when the wind distribution within a given region results in a net horizontal inflow of air into the area |
| cyclone | is an area of low atmospheric pressure characterized by inward spiralling winds that rotate counter clockwise in the northern hemisphere |
| divergence | the condition that exists when the wind distribution within a given region results in a net horizontal outflow of air into the area |
| gradient wind | the curved airflow pattern around a pressure center resulting from a balance amoung pressure gradient forces |
| high pressure | areas have more atmospheric mass above their location |
| isobar | a contour line of equal or constant pressure |
| low pressure | areas that have less atmospheric mass above their location |
| millibar | unit of pressure |
| prevailing wind | a wind that conisistently blows from one direction |
| ridge | a region of high atmospheric pressure |
| trough | an elongated region of low atmospheric pressure |
| wind | is the flow of air or other gases that compose an atmosphere |
| wind vane | is a movable device attached to an elevated object such as a roof for showing the direction of the wind |
| standard atmosphere | A standard reference value for air pressure |
| barograph | is a recording aneroid barometer |
| aneroid barometer | a type of barometer that consists of empty metal chambers |
| air pressure | the force exerted by the weight of a column of air above a given point |
