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Chemical Changes

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    chemical changes
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  • Ash created from burning wood (physical change or chemical change)
    chemical change
  •  15
  • Gases created when baking soda and vinegar are mixed (physical change or chemical change)
    chemical change
  •  15
  • Cutting a log into many pieces (physical change or chemical change)
    physical change
  •  15
  • Melting an ice cube to get liquid water (physical change or chemical change)
    physical change
  •  15
  • Rolling a ball of clay into a long straight line (physical change or chemical change)
    physical change
  •  15
  • Which of the following new substances are created when wood is burned?
    Carbon dioxide, ash, water vapor
  •  20
  • You observe chemical properties when a substance ______.
    Becomes a new substance
  •  10
  • What are the properties of wood?
    Hard, brown, solid
  •  15
  • What happens when you burn a candle?
    A chemical change occurs and both light and heat energy are released.
  •  20
  • A change in matter that produces a new compound or substance with different properties from the original
    chemical change
  •  15
  • substances we start with
    reactants
  •  10
  • what we are left with after the chemical reaction
    products
  •  10
  • Physical changes (easier/harder) to reverse than chemical changes.
    easier
  •  10
  • Matter cannot be ________ or _________ in a chemical change.
    created, destroyed
  •  15
  • What are some examples of chemical changes?
    Rusting, cooking, baking, burning paper
  •  15
  • What are some examples of physical changes?
    melting ice, cutting paper, boiling water, breaking glass
  •  15