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Is it physical or chemical? page 133. Physical Change. Any change in size, amount, shape, or state/phase of matter. nothing new is created Ex.) melting a block of ice, cutting a piece of paper in half. Chemical Change. substances change into new substances with different properties

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Physical Change

  • Any change in size, amount, shape, or state/phase of matter.
  • nothing new is created

Ex.) melting a block of ice, cutting a piece of paper in half

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Chemical Change

  • substances change into new substances with differentproperties
  • The original substance no longer exists
  • Substances that undergo chemical change easily (like alkali metals) have a high reactivity

Ex.) Digestion, spoiled food, explosives, and rust

physical or chemical change
Physical or Chemical Change?

Dissolving Salt/ http://www.youtube.com/watch?v=2WS5eFc8x1U

physical or chemical change1
Physical or Chemical Change?
  • Bleach and food dye http://www.youtube.com/watch?v=25tm3G3a0Wo
physical or chemical change2
Physical or Chemical Change?
  • dry ice CO2 goes from solid to gas – sublimation
physical or chemical change3
Physical or Chemical Change?
  • bending magnesium strip
physical or chemical change5
Physical or Chemical Change?
  • vinegar and steel wool = Rust
  • vinegar and steel wool = Rust
physical or chemical change6
Physical or Chemical Change?
  • vinegar added to milk and the milk curdles
physical or chemical change7
Physical or Chemical Change?
  • bending magnesium strip