Deductive reasoning is a logical thinking process that starts from a general principle or theory and moves toward a specific conclusion. In science, it is used to test hypotheses and theories through experimentation.Format:General idea (premise) → Specific example → ConclusionExamplePremise - All metals expand when heated.Specific case - Iron is a metal.This type of reasoning helps scientists:Apply known laws (like Newton’s laws or the law of gravity) to predict what will happen in specific situations.Design experiments to test these predictions.Confirm whether a general rule is true in all tested cases.Deductive reasoning is often used in mathematics, chemistry, and physics where principles are well-established. It ensures that conclusions are logical and based on prior knowledge.