Scientists use anemometers, which rotate at various speeds as they are propelled with the wind's speed, to measure air speed on a scale of 0 to 12.
(Scientists; use; anemometers, which rotate at various speeds; to measure air speed on a scale of 0 to 12) (anemometers; rotate; ) (they; are propelled; )
Scientists anemometers they
use rotate are propelled
anemometers, which rotate at various speeds to measure air speed on a scale of 0 to 12