1. What‘s Matter? I Don’t know. What’s a matter with you?

2. Matter is anything that has mass and takes up space .

9. Phase changes When heat energy is added, the molecules speed up and spread apart causing a PHASE CHANGE. SOLID LIQUID GAS melting evaporating

10. Phase changes When heat energy is removed, the molecules slow down and get closer together, causing a PHASE CHANGE. SOLID LIQUID GAS freezing condensation

11. Demonstration of melting: A solid turns into a liquid .

12. Demonstration of freezing: A liquid turns into a solid .

13. Demonstration of boiling: A liquid turns into a gas .

14. Demonstration of condensation: A gas turns into a liquid .

15. During the time that the object is going through a phase change, the temperature remains the same.

16. So that’s matter???