| Term | Definition |
|---|---|
| Forecast | To predict |
| Meteorologists make their forecasts based on the five most important properties of air: ___, ___, ___, ___ ___, and ___ ___. | temperature, pressure, humidity, wind direction, wind speed |
| Thermometer | Measures air's temperature |
| ___ ___ use the expansion or contraction of a liquid in a thin tube to indicate the temperature | Liquid thermometers |
| Maximum-minimum thermometer | Meteorologists used this type of liquid thermometer to record the highest and lowest temperature of the day and night during a particular period |
| ___ ___ thermometers used two thin strips of different metal, bound together to form a(n) ___ __ to tell temperature. | Bimetallic strip, bimetallic strip |
| A(n) ___ thermometer records temperature changes over time. | thermograph |
| ___ ___ measure the effect of temperature on special electrical circuits. | Electrical thermometers |
| Falling atmospheric pressure usually indicates ___ weather, while rising pressure usually indicates ___ weather. | bad, good |
| Barometer | Measures atmospheric pressure |
| Mercury barometer | The oldest type of barometer |
| A(n) ___ ___ uses a flexible, airtight metal box to measure changes in pressure. | aneroid barometer |
| A(n) ___ measures changes in air pressure over time. | barograph |
| Bar | A unit of pressure used in meteorology |
| Millibars | Used to measure small changes in atmospheric pressure |
| Hygrometer | Used to measure relative humidity |
| The difference in a hygrometer's two different temperature readings is called the ___-___ ___. | wet-bulb depression |
| A(n) ___ ____ uses a strand of hair to measure relative humidity. | hair hygrometer |
| Weather vane | Indicates the direction of wind |
| Anemometer | Measures wind speeds near the earth's surface |
| A(n) ___ has propellers mounted on the end of a weather vane. | aerovane |
| Rain gauge | Measures the amount of precipitation that fell |
| Automatic weather stations | Allow atmospheric conditions to be monitored without a meteorologist on the sight |
| Transmissometer | Measures visibility |
| Visibility | The farthest distance at which objects can be distinguished |
| One important group of automatic weather stations, the ___ ___ ___ ___ (ASOS) is used extensively by the National Weather Service for weather forecasting. | Automated Surface Observing System |
| One type of shelter, a(n) ___ ___, has slatted sides and a slatted base to allow air to freely flow through the boxlike shelter and reach the instruments inside. | Stevenson screen |
| Radiosondes | Instruments that simultaneously measure and transmit meteorological data from balloons to weather stations |
| Meteorologists often measure high-altitude weather conditions by attaching instruments to unmanned helium or hydrogen ___ ___. | weather balloons |
| Sounding rockets | Measure high altitude conditions |
| Ceilometer | Used to measure the distance from the ground to the base of a cloud |
| Radar (RAdio Detection And Ranging) | Uses radio waves to detect objects and measure their distance |
| A mesocyclone's development is revealed by a hook-like echo called a(n) ___ ___. | hook echo |
| Doppler radar | Can measure both precipitation and the speed and direction of winds |
| Weather satellite | Tracks weather circles around the world and provides meteorologists with valuable information |
| Surface weather charts | Maps that give a summary of the weather conditions throughout the entire country at a single point in time |
| Station model | A group of numbers and symbols |
| Isobars ("lines of equal pressure") | Curved lines used to represent the recorded air pressures |
| ___ connect areas with equal air pressure. | Isobars |
| a little random cutie card:) | 🙂 -__- 😉 :p |
| Isotherms ("lines of equal heat") | Connects stations that have the same temperature |
| Weather forecasts | Predictions of what the weather will be like in the near future |
| Super computer | Extremely powerful computer capable of rapidly performing complex calculations |
