Question

which would a scientist most likely do before asking a question that could lead to a scientific experiment? measure plant growth in response to different fertilizers determine the mass of a product from a chemical reaction count the number of seeds that germinated after soaking in water observe the number of tulip plants that sprouted late in a garden

Explanation:

A scientific experiment often starts with making observations. Measuring plant growth in response to different fertilizers is an observation - based activity that can lead to a testable question. Counting the number of seeds germinated and observing late - sprouting tulips are also observations. Determining the mass of a product from a chemical reaction is more about measurement in a chemical context rather than an initial step to form a question for an experiment.

Answer:

measure plant growth in response to different fertilizers