Question

complete the sentences with the correct words.
before class, the chemistry teacher blank a clear approach and collected the necessary blank for a challenging experiment. even with a plan, the teacher was met with blank of questions from different groups. but as the activity blank, lab groups found their blank and completed the experiment successfully.
(materials, barrages, formulated, unfolded, rhythms)

Explanation:

1. First blank: The context is about the teacher preparing a clear approach before class. "formulated" means to develop or create a plan/approach, so it fits here.
2. Second blank: For an experiment, the teacher would collect necessary "materials" (supplies needed for the experiment).
3. Third blank: "barrages" of questions means a lot of questions (a continuous flow), which makes sense as groups would have many questions.
4. Fourth blank: As the activity "unfolded" (progressed or happened), the lab groups worked.
5. Fifth blank: "rhythms" here can mean their pace or way of working, so lab groups found their rhythms to complete the experiment.

Answer:

1. formulated
2. materials
3. barrages
4. unfolded
5. rhythms