Some rocks are more resistant to acid rain than others.
True or False

It is true because I had this question before

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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.