1. WARM UP 1.Compare and contrast the properties and forces present in solids, liquids, and gases. 2.Explain, in your own words, how the states of matter change. Use water as an example.

2. The Big Bang Theory

3. Phase Changes

4. Kinetic-Molecular Theory Molecules are in constant motion –Higher temperature increases motion

5. Kinetic-Molecular Theory Increased motion can break IMFs –Changes phase

6. Kinetic-Molecular Theory Temperature increase stops at points of phase change –All heat used to break forces, not move particles faster

7. Phase Changes Liquid Solid (Melting and Freezing) –Melting point –Particles break/make crystals

8. Phase Changes Liquid Gas (Vaporization and Condensation) –Boiling point –Particles escape from/enter liquid

9. Phase Changes Solid Gas –Sublimation (to gas) –Deposition (to solid)

10. IMFs and Phases Stronger forces require higher energy to break –Raises m.p. and b.p.

11. External Conditions and Phases b.p. is dependent on mass/gravity –Particles must escape upward –Greater mass requires more energy/heat to vaporize

12. External Conditions and Phases –b.p. is dependent on pressure Liquid bubbles push up (vapor pressure), air pushes down (air pressure) Vaporization when vapor pressure > air pressure –Lower b.p. at lower air pressure (high elevations)

13. WRAP UP Draw a phase change graph for water, showing the transition from ice to liquid to steam. Explain why the phase change graph shows flat areas.

14. WARM UP 1.Describe the relationship between the mass of a particle and the boiling point of its liquid. 2.Describe the relationship between the external air pressure and the boiling point of a liquid.

15. WRAP UP Describe the link between kinetic- molecular theory, intermolecular forces, and phase changes.

16. WARM UP “If you do what you’ve always done, you’ll get what you’ve always gotten.” – Tony Robbins 1.What does this mean to you? 2.How can you apply this to school?