Which instrument is used to measure air pressure?a4c1421cc1ad88da1d913c1aaa3e5a36.webm89 KB aThermometer bAnemometer cBarometer dHygrometer

To determine which instrument is used to measure air pressure, we should identify the function of each option provided:

1. Thermometer: This instrument measures temperature, commonly in degrees Celsius or Fahrenheit. It does not measure air pressure.

2. Anemometer: This device measures wind speed and direction. While it is related to weather conditions, it does not measure air pressure.

3. Barometer: This is the instrument specifically designed to measure atmospheric pressure. It can be used to forecast weather conditions based on the pressure readings.

4. Hygrometer: This device measures humidity in the air, not air pressure.

Final Answer

The correct instrument used to measure air pressure is c. Barometer.