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Unit #1Unit #2Unit #3Unit #4Unit #5Unit #6Unit #7Unit #8Unit #9Unit #10
spacerUNIT # 2  
spacerspacerIntroduction
spacerspacerObjectives
spacerspacerReading


spacer2.1 Physical
spacerStates of
spacerMatter

spacer2.2 Physical &
spacerChemical
spacerProperties
spacer2.3 Physical &
spacerChemical
spacerChanges

spacer2.4 Classific-
spaceration of

spacerMatter
spacerPure Substances

spacerMixtures

spacer2.5 Energy
spacerPotential and Kinetic Energy

spacerEndothermic and Exothermic Reactions
spacerLaw of Conservation of Energy

spacerspacerProblems
   

Unit #2MATTER AND ENERGY

2.3 - Physical and Chemical Changes

The changes matter undergoes are classified as either physical changes or chemical changes. A process in which a substance changes its physical form or appearance but not its basic composition is called a physical change. Can you name some physical changes?

Chemical changes are always changes in the composition and form of a substance. In a chemical change, matter is transformed completely into different materials and new substances are formed. The type of chemical changes that a substance can undergo are determined by its chemical properties. Can you name some chemical changes?

Section 3.4
Properties and Changes of Pure Substances ..p59

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