OBJ: Given notes and activity sheets SWBAT distinguish between atom, element, molecule, compound with 70 % accuracy.

DN: Explain the difference between an atom, element, molecule and compound.

ACT: Using wooden model . . . Review concepts of atom, element, molecule, compoundReview Endothermic vs ExothermicComplete AEMC Activity Sheet

HW: Read and complete Changes of State Activity Sheet (front & back). Work on Matter Review Sheets, Matter Exam, 9/30.

Atom, Element Molecule, Compound

• Atom: microscopically tiny basic particle of visible matter (Model: marble)

• Element: kind of atom (Model: red marble, green marble); Periodic Table of Elements

• Molecule: two or more atoms bonded together (2red-1green marbles; 2 green marbles)

• Compound: two or more different atoms bonded together (Model: 2red-1green marble)

ENDOTHERMIC VS EXOTHERMIC

• Endothermic: thermal energy in

melting, boil, evaporate, vaporize

• Exothermic: thermal energy out;

(exo ~ exit); condense, freeze

Changes of StateChanges of State

Thermal Energy Movement of Particles

Melting(solid-liquid)

Gain Increase

Freezing(liquid-solid)

Loss Decrease

Vaporization

Evaporation(liquid-gas)

Gain Increase

Condensation(gas-liquid)

Loss Decrease

Building Vocabulary

• 6. boiling point• 7. condensation• 8. vaporization• 9. boiling• 10. evaporation• 11. melting• 12. freezing• 13. melting point• 14. sublimation