After scientist make a hypothesis they perform a?

Answer

According to the scientific method, scientists perform an experiment.

Answer

I suppose you could say scientists perform an experiment next, but that is skipping some crucial points. How can you perform an experiment when all you have are ideas? Before you test out your hypothesis, you need to gather materials and draw up your procedure. Scientists just don't jump into something; they need a step-by-step plan of how they will carry out their test. In addition, they will also make predictions given their hypothesis. They need to know what result(s) will support or falsify the initial hypothesis.