Logic, observation and mathematics. Logic for figuring things out, observation for noticing things, math for getting exact numbers.
making an observation
based on observation of what is wrong with the work of other scientists
Scientists use observation and experimentation to learn about the natural world.
Scientists often find that quantitative observation is more important than qualitative observation.
observation
AnswerCell theory. .
they are classifying
Scientists have always reached their conclusions by means of observation and reasoning, whether in the middle ages or at any other time.
Observation helps scientists gather an collect data, which without, their experiment(s) could not exist
You have ricks!
they relied on observation an logic