Next, form a question from your idea. You will soon discover that most questions would require too much effort or time to investigate, or might not have a clear answer. Rather, you question should be strategic. The first question is more feasible than the second. Your questions might be more focused if they ask how species distributions or abundance are regulated, either by biotic interactions or by the abiotic environment.
Hypotheses are the scientific version of a question.
An hypothesis can be stated in such a way as to enable its rejection, or falsification. Thus, we can eliminate some alternatives in favor of others. Here we are claim that temperature has no effect on the reaction rate. This hypothesis can be rejected simply by showing that reaction rates do depend on temperature. Rejecting H o let's us move ahead because we then know that temperature does indeed matter.