• A hypothesis is a reasonable explanation for a small range of phenomena.
  • A hypothesis is limited in scope; it attempts to explain a single event or a fact.
  • Testing a hypothesis requires making observations or performing experiments.
  • A scientific hypothesis must be both testable and falsifiable.
  • If two or more hypotheses are being tested, they are called multiple working hypotheses.
  • Write an example of a hypothesis, and explain how you would test it.
  • Use the resource below to answer the questions that follow.
  • The two hypotheses below address a question about carbon dioxide in the atmosphere.
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