Physical and Chemical Change

By: Mary Sevart

Physical Properties

Any characteristic of a material that can be observed or measured without changing the identity of the material.


Examples:


  • color and shape
  • length and mass
  • volume and density (D=M/V)

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Physical Change

The physical property of a substance change, but the identity of the substance does not change.


Examples:


  • changing from one state of matter to the next (ice melts to liquid-liquid boils to steam)
  • melting 0 degrees C and boiling point 100 degrees C
  • slicing bread, melting ice, mowing lawn

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Chemical Properties

Any characteristic that gives a substance the ability to undergo a change that results in a new substance.


Examples:


  • flammability (ability to burn)
  • reacts with oxygen (ability to rust)
  • reacts with light (pictures being developed)
  • reacts with water (medicine dissolving in water)

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Chemical Change

A change in the identity of a substance due to the chemical properties of that substance (You have a new substance[Is it reversible? NO])


Examples:


  • flammability (fire burning to ash)
  • reacts with oxygen (fruit rotting)
  • heat and light (vitamins can change exposed to light)
  • electricity (water can be broken down with electricity)

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