Question

what is the main focus of the \formative assessment\ section in the document? to measure students skills in laboratory safety to test students knowledge of chemical equations to evaluate students understanding of mixtures and pure substances to assess students ability to balance chemical reactions

Explanation:

Formative assessment focuses on evaluating students' learning progress and understanding during the learning - process. Among the options, evaluating students' understanding of mixtures and pure substances aligns with the concept of formative assessment in a chemistry - related context.

Answer:

To evaluate students' understanding of mixtures and pure substances