How does a microwave primarily work?
Correct answer: C. It cooks food via resonance
- A. It cooks food via conduction
- B. It cooks food via convection
- C. It cooks food via resonance
- D. It cooks food via radiation
Explanation
Microwaves operate by emitting electromagnetic waves that match the natural resonant frequency of water molecules. This causes the molecules to vibrate vigorously, generating heat through molecular friction. This heat cooks the food. Option C is correct because it accurately describes this process of resonance. Option A is incorrect because conduction requires direct contact, which is not how microwaves function. Option B is incorrect as convection involves fluid movement, which is not applicable here. Option D, while partially correct in mentioning radiation, does not highlight the specific mechanism of resonance that is central to microwave cooking.
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Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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