What tool would you use to find the mass of 10 marbles?

i think it's c. i'm not sure but i think so.

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.

c, liquids evaporate, creating a gas