Match the following. match the items in the left column to the items in the right column. 1. anemometer measures humidity 2. barometer a change in the frequency of sound or light waves that can be used to determine the direction of movement of a wave source 3. doppler effect measures the location and strength of precipitation 4. doppler radar a transmitter sent up in a weather balloon to send measurements of air temperature, humidity, wind speed, and wind direction 5. hygrometer measures wind speed 6. psychrometer measures air pressure 7. radiosonde measures relative humidity using a pair of dry bulb and wet bulb thermometers