I’ll mark you Brainliest if you list the controls & constants for #2! Read the scenarios & identify the independent & dependent variable.

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.

it would be a gas formation

that's what i got you can count the number of atoms

може ли да зареждате повече информация, моля