Which instrument would you use to measure rainfall amounts?

Which instrument would you use to measure rainfall amounts?

• A. Rain gauge
• B. Thermometer
• C. Barometer
• D. Hygrometer

Answer: (A)

Measuring rainfall amounts requires an instrument that collects precipitation and shows how much fell. A rain gauge is designed for that exact purpose: it catches rain in a container and uses a scale to display the depth of water, giving you the rainfall amount in units like millimeters or inches. A thermometer measures temperature, not rainfall. A barometer tracks air pressure, which helps predict weather but doesn’t tell you how much rain fell. A hygrometer measures humidity in the air, not the amount of rain that has already fallen. So, the tool you would use to measure rainfall amounts is the rain gauge.

Measuring rainfall amounts requires an instrument that collects precipitation and shows how much fell. A rain gauge is designed for that exact purpose: it catches rain in a container and uses a scale to display the depth of water, giving you the rainfall amount in units like millimeters or inches.

A thermometer measures temperature, not rainfall. A barometer tracks air pressure, which helps predict weather but doesn’t tell you how much rain fell. A hygrometer measures humidity in the air, not the amount of rain that has already fallen.

So, the tool you would use to measure rainfall amounts is the rain gauge.