2.  1. What does the law of conservation of energy state? 2. How does the motion of molecules relate to temperature? 3. Heat is always transferred from a ______ object to a ________ object 4. What are the three ways in which heat is transferred? 5. What is an example of a phase change?

3. The law of conservation of energy states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system is a constant.

10.  A phase change is a physical change that occurs when a change in the amount of heat energy is involved.  A phase change occurs with the addition or removal of heat

11.  The expansion of a substance due to heat  Most solids, liquids, and gases expand as they are heated