Chemical properties-and-changes
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The document discusses the differences between physical and chemical changes, noting that physical changes alter a substance's appearance but not its chemical composition, while chemical changes produce new substances with different properties. Examples of physical changes include cutting, cracking, chopping, bending, and tearing materials, while chemical changes include burning wood, frying an egg, digesting food, and rusting metal. Signs that a chemical change occurred include a new color, odor, gas/smoke production, or temperature change.
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Chemical properties-and-changes
- 1. Chemical Properties and Changes
- 3. Chemical Properties determine how a substance interacts with other substances Some examples are: *flammability *reactivity to an acid *reactivity to water
- 7. Physical or Chemical??? Use the A-F cards to separate the Physical Changes from the Chemical Changes! A. You cut a sheet of aluminum foil in half B. Your friend melts some butter for her popcorn C. Your Mom lights a candle in a dark room D. Rubbing alcohol evaporates from your hand E. Hydrogen peroxide bubbles when you put it on a cut on your leg F. You leave the milk on the counter all night and discover it has soured in the morning