Friday September 21, 2012

1. FridaySeptember 21, 2012 • (Phases of Matter; Quiz 4)

2. Bell RingerFriday, 9-21-12 Identify the following processes of matter as involving either physical or chemical properties: burning (combustion) melting rusting density decomposing mass photosynthesis chemical physical chemical physical chemical physical chemical

3. Bell RingerFriday, 9-21-12 Identify the following properties of matter as being either extensive or intensive: melting point volume density mass amount of energy in a material sample boiling point ability to conduct electricity intensive extensive intensive extensive extensive intensive intensive

4. Announcements • None today

6. Phases of Matter • The Solid Phase of Matter • Matter in the solid phase has a definite shape and a definite volume. • In the solid phase, the particles of matter are packed together in relatively tight, fixed positions.

7. Phases of Matter • The Liquid Phase of Matter • Matter in the liquid phase has a definite volume but no definite shape. • In the liquid phase, the particles are close together but can move around one another.

8. Phases of Matter • The Gas Phase of Matter • Matter in the gas phase has neither a definite shape nor a definite volume. • Gas particles move very rapidly and are at a much greater distance from one another as compared to solids and liquids.

9. Quiz 4