| A | B |
|---|
| weather | the condition of the Earth's atmosphere at a given time in a given place |
| mass | amount of matter in an object |
| thermometer | weather tool that measures temperature |
| dew point | the temperature at which water changes from a gas to a liquid. Air is saturated. |
| meteorologist | the person who studies the Earth's weather |
| matter | that which has mass and occupies space |
| percent | unit of measure for humidity |
| air mass | A large body of air with only small horizontal variations of temperature, pressure, and moisture. |
| atmosphere | the gasses around the Earth |
| water vapor | water that is always in the air (water as a gas) |
| evaporation | the process by which liquid water becomes a gas called water vapor |
| compression | the process or result of becoming smaller or pressed (increases density) |
| density | the amount of matter in a volume of material |
| condensation | when water changes from a gas to a liquid |
| volume | the amount of space an object takes up |
| forecast | a prediction about how the weather will develop |
| saturate | when air contains as much water as it can hold |
| precipitation | water that falls from the sky (rain, sleet, hail, snow) |
| differential heating | different materials heat up at different rates (5x's more heat to raise water one degree that it takes to raise sane |
| relative humidity | the amount of water vapor in a volume of air compared to the amount necessary to fully saturate that volume of air-expressed as a percent |
| radiation | type of energy transfer, energy that travels in rays or waves through matter |
| conduction | when 2 different materials come into contact and their atoms or molecules actually touch and transfer energy |
| convection | happens only in fluid; when a mass of fluid, either liquid or gas, is warmer or colder than the surrounding air fluid, the mass will rise or sink in the surrounding fluid |
| land breeze | A breeze that blows from the land toward open water |
| 3 types of energy transfer | radiation, conduction, convection |
| how wind is formed | It's caused because the sun heats the planet differently, and over vast areas. As a place warms up, the air expands, causing a pressure change. Wind is simple high pressure air moving towards a low pressure region to balance things out. |
