Question

reading 1.1.1 : scientific models
how can we explain our observations of the van de graaff generator? scientists and engineers use models to help them understand and make predictions about natural phenomena (singular form: phenomenon).
phenomena are events that can be observed and repeated. for example, in class you saw aluminum pie pans fly off the van de graaff generator when it was turned on. if you repeated this setup, you would be able to make the same observations. this is an example of a phenomenon. a lot can be going on in a particular phenomenon, so scientists use models to communicate about what could be causing the outcomes that are observed.
what is the importance of models?
you have probably heard the term model used in some very different ways. maybe you think of a model as a person

Explanation:

From the text, models help scientists/engineers understand natural phenomena (like Van de Graaff generator observations) and make predictions. They also communicate what causes observed outcomes, especially for complex phenomena with repeatable observations.

Answer:

Models help scientists and engineers understand and make predictions about natural phenomena. They also communicate what could be causing the outcomes of observed (and repeatable) phenomena, aiding in explaining complex events (e.g., Van de Graaff generator observations).