Which is a better conductor of heat: air or a copper wire? why? a) air is a better conductor of heat because it is a mixture. reactivate b) copper is a better conductor of heat because it contains electrons. c) air conducts heat better because the molecules in a gas are further apart. reactivate d) copper wire conducts heat better because molecules in a solid are closer together.

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.

i believe the answer is true.

i think it's letter a.