| A | B |
|---|
| Atmosphere. | layer of gasses surrounding Earth: 78% nitrogen, 21%, 1% other gasses. |
| Weather. | State of the atmosphere at a given time and place. |
| Dew Point. | Temperature to which air is cooled and saturation occurs; condensation can occur at this temperature. |
| Relative Humidity. | Percent of water vapor in the air compared with the amount of water vapor the air can hold at that temperature. |
| Wind. | Movement of air caused by diffrences in temperature and density. |
| Anemometer. | instrument that measures wind speed |
| Air(Barometric)Pressure. | Force caused by the weight of a unit of air. |
| Barometer. | Instument that measures atmospheic pressure. |
| Psychrometer. | Insturment to measure wet and dry bulb temperature and use this for dewpoint. |
| Wind Vane. | Instrument to measure wind direction. |
