| A | B |
|---|
| air pressure | the weight of the gases in the atmosphere |
| weather | the current conditions in the atmosphere at a particular place and time |
| atmosphere | the ocean of air that surrounds the earth |
| ozone | heavy oxygen - 3 atoms of Oxygen O3 |
| Water Vapor | Water in the atmosphere in a gas state |
| Evaporation | A cooling process where the water goes from a liquid to a gas. |
| Condensation | The process of water changing from a gas to a liquid |
| Dew Point | The temperature at which vapor condenses. |
| Low pressure | indicates bad weather conditions |
| High Pressure | Indicative of Good weather |
| Anemometer | tool that measures wind speed |
| Barometer | Tool that measures air pressure |
| Hygrometer | Tool that measures the relative humidity |
| Thermometer | tool that measure temperature- degrees of heat |
| Weather vane | tool that mesures the wind direction |
| Rain Gauge | tool that measures the amount of rainfall |
| Nephoscope | tool that tracks the altitude and direction of cloud |
| fast moving air | creates low pressure |
| air pressure movement | Moves from High Pressure to low pressure |
| 14.7 lbs./sq. in. | Weight of air at sea level |
| Mass | The amount/number of atoms in a substance |
| Volume | The space an object takes up |
| Density | the mass of an object divided by the volume. How tightly packed atoms are in a substance |
| Wind | Movement of air. The greater the change in pressure the greater the wind speed. |
| Relative humidity | The % of moisture in the air |
| Heating Air | Expands air, decreasing the density making it lighter making it rise |
| Cooling Air | Contracts air, increasing the density, increasing the weight making it fall |
| High pressure | is heavier air |
| Low Pressure | is lighter air |
| Cold air | is heavier air |
| Warm air | is lighter air |
| 100 % humidity | When dew point and air temperature are the same |
| Evaporation | Water changes from a liquid to a gas- cooling process |
| Condensation | water changes from a gas to a liquid |
| Precipitation | rain, snow, sleet or hail |
| Transpiration | Plants give off water vapor back into the atmosphere |
