Final answer:
When scientists test a hypothesis, they conduct experiments to determine its validity. If the experimental results support the hypothesis, it is considered as a useful description of nature. Scientists may overlook unexpected findings that challenge their assumptions.
Step-by-step explanation:
When scientists test a hypothesis, they conduct experiments to determine whether the hypothesis is correct or not. These experiments involve collecting data and analyzing it to draw conclusions. If the experimental results support the hypothesis, it is considered as a useful description of nature. If the results contradict the hypothesis, scientists discard it and try to develop an alternative. It is important to note that scientists tend to formulate hypotheses based on previously understood knowledge and may overlook unexpected findings that challenge their assumptions.