Question

fiona wants to use the scientific method to answer the question \do oxygen levels in the air affect rates of photosynthesis?\ she reads about photosynthesis in her biology book and is ready to carry out the next step. what should she do next? perform an experiment design a procedure make observations form a hypothesis

Explanation:

The scientific method steps are: ask a question, do background research (she did this by reading the biology book), form a hypothesis (next logical step), design an experiment (after hypothesis), perform the experiment (after procedure design), make observations (during/after experiment).

Answer:

form a hypothesis