to obtain data to test a hypothesis to make a complete observation to make a report of the procedures to make a hypothesis understandable
During a space mission, scientists will send experiments for the astronauts to conduct in space. In many cases, scientists have made predictions about the outcome of the experiment. Why do astronauts perform the experiment if the results have already been predicted?

Options:
- to obtain data to test a hypothesis
- to make a complete observation
- to make a report of the procedures
- to make a hypothesis understandable

to obtain data to test a hypothesis