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