What Is a Hypothesis?

A hypothesis is a prediction that is tested with an experiment.
A hypothesis is a prediction that is tested with an experiment. Angela Lumsden, Getty Images

Question: What Is a Hypothesis?

Answer: A hypothesis is a proposed explanation for an observation. Observations and experiments may disprove a hypothesis, but can never entirely prove one.

Example of a Hypothesis

  • If you drop a rock and a feather, they will fall at the same rate.
  • Plants need sunlight in order to live.
  • Eating sugar gives you energy.