3Satellite What is it? What kinds of data can it take? Atmospheric temperatureSurface temperatureWind speedWater temperatureWave heightsWhat is it?A man-made, electronic satellite which transmits information about current weather patterns to the ground from space.
5CompassTo what directions does it point?CardinalNorthSouthEastWestIntermediateNortheastSoutheastNorthwestSouthwestWhat is it?A device that is used to find direction by means of a needle that always points north
9AnemometerWhat is it?An instrument for measuring and indicating the force or speed of wind.How does a Cup Anemometer work?3 metal cups attached to the ends of horizontal arms mounted on a vertical shaft. Wind catching in the cups causes them to revolve. This action turns the shaft which is connected to a dvide that gives the wind speed in miles per hour.
11Rain Gauge What is it? An instrument used to measure precipitation. How does it work?A standard rain gauge consists of a funnel leading to a measuring tube. The area of the circular top of the funnel is 10 times that of the tube's cross section, so that one inch of water falling on the funnel will rise to 10 inches in the tube. The tube thus multiplies the height of the fallen water by 10, making it possible to measure small amounts of precipitation.
13Sling Psychrometer What is it? Measures relative humidity, using the cooling effect of evaporationHow does it work?Two thermometers are used in a sling psychrometer. Wet the cloth of one of the thermometers and swing the psychrometer around a few times. Water evaporates from the cloth, causing the temperatures on theat thermometer to be lower than the other.
15BarometerWhat is it?A device for measuring atmospheric pressure (the pressure resulting from the weight of the air above a given point)How is it used?A change in atmospheric pressure is a sign of changing weather. A “falling” barometer, indicating reduced pressure, shows that a low-pressure mass of air is approaching. A “rising” barometer generally means an approaching high- pressure air mass and fairer weather.
17Thermometer What is it? An instrument for measuring temperature How does it work?The measurement is always indirect—that is, it is a measurement not of temperature itself but of the effect of temperature on some physical property of a material used in the thermometer. In response to changes in temperature, for example, solids, liquids, and gases expand and contract; the pressure of a gas that is kept at a constant volume changes; and the electrical resistance of a metal or alloy increases and decreases.