Bell Ringer What are the 4 states of matter?

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Presentation transcript:

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 HowStuffWorks Videos "States of Matter: Energy and the Four States of Matter"

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

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

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

Changes in States of Matter Solid Liquid Gas Interpreting changes of state

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