Physical property
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Physical Property. Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material. THINK/PAIR/SHARE: What are some words that you would use to describe the physical properties of matter? Investigation:

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Physical property
Physical Property

  • Any characteristic of a material that can be observed or measured without changing the composition of the substances in the material.

  • THINK/PAIR/SHARE: What are some words that you would use to describe the physical properties of matter?

  • Investigation:

    • Hold a sheet of newspaper horizontally. Now tear it in to strips.

    • Repeat, but this time hold the newspaper vertically.

    • Is there a difference in your ability to tear the newspaper?

    • Why? The molecules are chained together in a line. It is easier to separate the chains lengthwise than break the chains in half.



Chemical property
Chemical Property

  • Any ability a material has to produce change in the composition of matter.

  • THINK/PAIR/SHARE: What are some words that you would use to describe the chemical properties of matter?

  • Demonstrations:


Explaining matter s properties
Explaining Matter’s Properties

  • THINK/PAIR/SHARE: Why is matter so different? Why are there so many different kinds of matter?

    • The properties of matter are determined partially by how its particles are arranged. For example, the graphite in your pencil is made up of the same particles as a diamond, they are just arranged differently.

  • THINK/PAIR/SHARE: Can you use the properties of a known substance to help you identify an unknown substance? If so, then how would you do it?

    • Yes, of course you can use the properties of a known substance to identify and unknown substance!

    • The first step is to decide which properties to test. Then, carry out the tests on a sample of the unknown. Finally, compare the results with the data reported for known materials.


Explaining matter s properties1
Explaining Matter’s Properties

  • Physical and chemical properties are used to …

    • identify a material

      • EXAMPLE: Water boils at 100oC at sea level

    • choose a material for a specific purpose

      • EXAMPLE: Copper is an excellent conductor of electricity and that’s why we use it for wiring.

    • to separate the substances in a mixture

      • EXAMPLE: You can pick all the Crunch Berries out of a cereal bowl because you like them the best!

      • Filtration is a process that separates materials based on the size of their particles.

        • EXAMPLE: Coffee or tea, Using a strainer

      • Distillation is a process that separates the substances in a solution based on their boiling points.

        • EXAMPLE: Converting saltwater to freshwater


Let s practice
Let’s Practice

  • Tools of the Physical Scientist – The Bunsen Burner Lab


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