Barometer
Explanation
Atmospheric pressure is the weight of the column of air at any given place and time. It is a fundamental weather element measured to understand and predict weather patterns.Analysis of Options:
- Thermometer: This instrument is used to measure air temperature, not pressure.
- Barometer: This is the standard instrument used to measure atmospheric pressure. The mercury barometer, invented by Evangelista Torricelli, and the aneroid barometer are the two most common types used in meteorology.
- Rain Gauge Rain Gauge: This device is employed to measure the amount of liquid precipitation (rainfall) over a set period.
- Wind Vane Wind Vane: This instrument is used to determine the direction from which the wind is blowing.
Key Takeaway: The barometer is the specific instrument for measuring atmospheric pressure, whereas thermometers, rain gauges, and wind vanes measure temperature, precipitation, and wind direction, respectively.