The correct option is 1 only
Explanation
Meteorological instruments are standardized devices used to measure specific atmospheric variables such as temperature, pressure, and precipitation, which are essential for weather forecasting and climatic study.- Pair 1 is correctly matched: A Thermometer is the standard instrument used to measure temperature. It operates on the principle of thermal expansion of liquids (like mercury or alcohol) or changes in electrical resistance to quantify the degree of heat.
- Pair 2 is incorrectly matched: A Barometer is used to measure atmospheric pressure. It does not measure rainfall. Atmospheric pressure refers to the weight of the air column exerted on the Earth's surface.
- Pair 3 is incorrectly matched: A Rain Gauge is an instrument used to measure the amount of liquid precipitation (rainfall) that falls over a specific period. It does not measure atmospheric pressure.
Key Takeaway: The Thermometer measures temperature, the Barometer measures atmospheric pressure, and the Rain Gauge measures rainfall.