Q.8. The amount of matter __ during a phase change. a) increases b) stays the same c) decreases Q.9. A substance has a melting point of -10^circ C and a boiling point of 60^circ C What will be state of this substance at -27^circ C a) Solid b) Liquid c) Gas Q.10. Which of the following phase changes requires the subtraction of heat energy? a) Melting b) Vaporization c) Sublimation d) Condensation

Q.8. The amount of matter __ during a phase change.b) stays the sameQ.9. A substance has a melting point of and a boiling point of What will be the state of this substance at a) SolidQ.10. Which of the following phase changes requires the subtraction of heat energy?d) Condensation