Weather Report
Terms
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- Relative humidity
- The amount of water vapor that is currently in the air compared to how much the air can hold at a specific temperature.
- Air Pressure
- The weight of air above a given point. Changes in the air pressure or barometric pressure mean a change in weather.
- Temperature
- The amount of heat (hotness or coldness) of an object or substance.It can also be thought of as a measure of the speed of atoms and molecules.
- Cold Front
- An area in which cold, dry air from the poles is replacing warm, moist tropical air. A cold front is shown on a weather map as a solid blue line with triangles showing the direction the front is moving. Cold fronts typically move twice as fast as warm fronts.
- Humidity
- The amount of water vapor in the air.
- Convection
- The motion of air upward, caused by heating.
- Lower Air Pressure
- Usually mean bad weather because air is rising.
- Barometer
- An instrument used to measure air pressure.
- Fronts
- The transition zone between two different air masses with different temperatures and humidity levels.
- Warm Front
- An area in which warm, moist air from tropical areas is replacing colder, dryer air from the poles. Warm fronts are drawn on a weather map as a solid red line with half circles indicating the direction the front is moving. Warm fronts typically move at about half the speed of cold fronts.
- Higher Air Pressure
- Usually means clear weather because air is sinking toward the earth.
- Thermometer
- An instrument used to measure temperature. Units of temperature are usually given as degrees Fahrenheit or degrees Celsius
- Precipitation
- Any form of water that comes out of the atmosphere and hits the ground.
- Conduction
- The transfer of heat from an area of warmer temperature to an area of colder temperature.