To test hypotheses, scientists create experiments.
Lots of different scientists test the same things to compare different conclusions.
Scientists test hypothesis by setting up an experiment. They choose a independent and a dependent variable and test the experiment.
if your referring to the scientific method, scientists test the dependent variable
early scientists were not to test their theroies
Scientists may refer to an additional test as a "supplementary test" or "secondary test" to gather more data or verify results.
hypotheses
So that other scientists can test what you told them.
A theory
models
They are teenage scientists.
Scientific Method
they test