Astudent growing a crystal finds that the mass of the crystal decreased from one day to the next day. why? a. student added to little saturated solution to the crystal growing vessel b. student added too much saturated solution to the crystal growing vessel c. the string around crystal was tied too tightlu d. temp went up

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.