S2.3 Concluding and evaluating

Answer the research question

State a conclusion that directly answers the question and refers to the observed relationship, graph or calculated value. Do not merely repeat the procedure.

Use uncertainty in the claim

Compare measured and accepted values using their uncertainties. A value within the uncertainty range supports agreement; a value outside it suggests disagreement or a limitation.

Discuss scientific context

Relate the result to the model or law being tested, and state whether the evidence is strong enough for the scope of the investigation.

Common trap

Do not call a result accurate simply because it is close to an accepted value without comparing the uncertainty.

Explain the effect of an error

Name the systematic error, state how it changes the measured variable, and then state whether the calculated result is too high or too low. For example, heat lost to surroundings makes the calculated specific heat capacity too large if input energy is used as though it all entered the water.

State a limitation

A limitation is a feature of the apparatus, range, model or assumption that restricts the conclusion. Link it to the evidence rather than listing a generic “human error.”

Propose a realistic improvement

Change the method or apparatus so the named error is reduced or measured: insulate, calibrate, widen the independent-variable range, repeat readings or use independent review when evaluating scientific validity.

Common trap

Do not propose “be more careful” as an improvement. It must target a stated source of uncertainty or bias and have a physical effect.