Hmmmm. If they use one, it is ...
This is a very odd question. Scientists use observation and research to gather information.
When scientists use one of their five senses to gather information, they are?
4 answers
I would also say: they are observing.
usually that word is reserved for sight, but there's no reason any other sense could not be used to observe.
usually that word is reserved for sight, but there's no reason any other sense could not be used to observe.
observing
gather data through observation