Which statement describes a chemical property of an object? The object is white in color.
The object is white in color.

the object has a powdery texture.
the object has a powdery texture.

The object's density is 2.11 g/cm3
The object's density is 2.11 g/cm3

The object reacts with acid to form water.

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.