A scientist wants to use a model to help present the results of his detailed scientific investigation. Why would a model be useful?
because the model makes the concepts easier to understand
because the model is easy to put together and to use
because the model prevents other scientists from asking questions
Obecause the model requires the audience to pay full attention to it

Because the model makes the concepts easier to understand

Explanation:

Models are created to give a visual of every aspect of an experiment. This allows for a better understanding across the board for everyone.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error