Final answer:
In science, hypotheses must be testable and falsifiable. A testable hypothesis is one that can be proven false through experimental results. Falsifiability means that the hypothesis can be disproven by evidence or observations.
Step-by-step explanation:
In science, hypotheses must be testable and falsifiable. A testable hypothesis is one that can be proven false through experimental results. Falsifiability means that the hypothesis can be disproven by evidence or observations.
For example, the hypothesis that massive chunks of rock and ice hitting Earth have a significant impact on life on Earth is still debated. This hypothesis is testable because observations and experiments can be conducted to gather evidence for or against it.
On the other hand, the presence of supernatural forces is not testable or falsifiable, making hypotheses about them non-falsifiable. Scientific hypotheses require empirical evidence to support or reject them.