In a physical change the make up of matter is changed.
O True
O False

yes it is true

Explanation:

evaporation occurs when burning liquid water changes into gas.

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.

the answer would be b i believe