25 points, this is the last question on my test, it is timed, hurry? question below, !

Which characteristics can be used to differentiate star systems? check all that apply.

Avariable that is not being directly tested during an experiment should be

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.