As the temperature rises, the electric current that flows through the material of the electrical thermometer increases and is translated into temperature readings. A thermistor, or thermal resistor, is a type of electrical thermometer that responds very quickly to temperature changes. Air Pressure barometer - an instrument that measures pressure Changes in air pressure affect air masses. The approach of a is usually indicated by a drop in air pressure. Wind anemometer - an instrument used to measure wind speed A typical anemometer consists of small cups that are attached by spokes to a shaft that rotates freely. The wind pushes against the cup and causes them to rotate. This rotation triggers an electrical signal that registers the wind speed in meters per second or in miles per hour. Wind Direction wind vane - an instrument used to determine direction of the wind The wind vane is commonly an arrow-shaped device that turns freely on a pole as the tail catches the wind. Wind direction may be described by one of 16 compass directions, such as north-northeast. Wind direction also may be recorded in degrees by moving clockwise and beginning with 0° at the north. READING CHECK Which instrument is used to measure air pressure? A barometer is used to measure atmospheric pressure. Measuring Conditions
As the temperature rises, the electric current that flows through the material of the electrical thermometer increases and is translated into temperature readings. A thermistor, or thermal resistor, is a type of electrical thermometer that responds very quickly to temperature changes. Air Pressure barometer - an instrument that measures pressure Changes in air pressure affect air masses. The approach of a is usually indicated by a drop in air pressure. Wind anemometer - an instrument used to measure wind speed A typical anemometer consists of small cups that are attached by spokes to a shaft that rotates freely. The wind pushes against the cup and causes them to rotate. This rotation triggers an electrical signal that registers the wind speed in meters per second or in miles per hour. Wind Direction wind vane - an instrument used to determine direction of the wind The wind vane is commonly an arrow-shaped device that turns freely on a pole as the tail catches the wind. Wind direction may be described by one of 16 compass directions, such as north-northeast. Wind direction also may be recorded in degrees by moving clockwise and beginning with 0° at the north. READING CHECK Which instrument is used to measure air pressure? A barometer is used to measure atmospheric pressure. Measuring Conditions
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