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Bell Ringer 9-14-09

Bell Ringer 9-14-09. What are the 4 states of matter? How do the particles of solids move? Name the 2 types of solids. What is an example of each? Name the 2 properties of liquids. Chapter 3 Section 2 Changes of State. Demonstration

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Bell Ringer 9-14-09

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  1. Bell Ringer 9-14-09 What are the 4 states of matter? How do the particles of solids move? Name the 2 types of solids. What is an example of each? Name the 2 properties of liquids.

  2. Chapter 3 Section 2Changes of State

  3. Demonstration • HowStuffWorks Videos "States of Matter: Energy and the Four States of Matter"

  4. Changes between Solid and Liquid • Melting- solid  liquid • At its melting point, particles of a solid substance are vibrating so fast that they break free from their fixed positions. • Melting point of pure water = 0oC • Increase in thermal energy • Freezing- liquid  solid • At its freezing point, the particles of a liquid are moving so slowly that they begin to form regular patterns • Freezing point of pure water = 0oC • Decrease in thermal energy

  5. Changes between Liquid and Gas • Vaporization- liquid  gas • Increase in thermal energy • Evaporation- vaporization on the surface • Ex: disappearing puddle of water • Boiling- vaporization below and at the surface • Ex: when liquid bubbles • Boiling point- temperature at which liquid boils • Boiling point changes with Air Pressure • Condensation- gas  liquid • Ex: breathing onto a mirror, formation of clouds • Decrease in thermal energy

  6. Changes between Solid and Gas • Sublimation- solid  gas • Ex: dry ice (solid carbon dioxide)

  7. Changes in States of Matter • Solid • Liquid • Gas • Interpreting changes of state

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