| A | B |
|---|
| weather | the condition of the Earth's atmosphere at a given time in a given place |
| meteorology | the scientific study of the Earth's weather |
| meteorologist | a person who studies the Earth's weather |
| weather instruments | used to measure weather conditions |
| convection | circulation in a fluid that results from energy transfer; during this process, warm masses of air rise and cool masses of air sink |
| water vapor | water that is always in the air |
| clouds | form when air cool and water vapor condenses on dust or other nuclei |
| thermometer | weather instument that measures temperature in degrees C or F |
| barometer | weather instument that measures air pressure in millibars |
| hygrometer | weather instument that measures humidity in pecentage |
| wind vane | weather instument that measures wind direction measured in compass points |
| anemometer | weather instument that measures wind speed in k/hr |
| forecast | a prediction about what kind of weather to expect |
| severe weather | weather that is dangerous or causes damage |
| atmosphere | the gases around the Earth |
| weather factors | properties of air that affect weather |
| compressed | forced into a smaller space |
| pressure | the force of the air pushing in all directions |
| mass | amount of matter in an object |
| weight | is the force an object exerts because of gravity |
| Troposphere | the part of Earth's atmoshpere where weather takes place |
| different kinds of weather | associated with different seasons |
