Answer the questions.

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green