6.8—Evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made

Be able to evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made in the experiments Students will need to consider experiments where substances are mixed in an insulated container and combustion experiments using, for example, a spirit burner and be able to draw suitable graphs and use cooling curve corrections.

Use —evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made to connect the rule to the data and decision in the question.

This matters because —evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Evaluate the results obtained from experiments and comment on sources of error and uncertainty and any assumptions made is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.