by liz larosa 5 th grade science 2009 classifying matter: elements, compounds, and mixtures
TRANSCRIPT
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By Liz LaRosa 5th Grade Sciencewww.middleschoolscience.com 2009
Classifying Matter:Elements, Compounds, and
Mixtures
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Pure Substances
A sample of matter that has definite chemical and physical properties.
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Elementspure substance that cannot be separated into
simpler substance by physical or chemical means.
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Compounds
Pure substance composed of two or more different elements joined by chemical bonds.
Made of elements in a specific ratio that is always the sameHas a chemical formulaCan only be separated by chemical means, not physically
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Mixtures
A combination of two or more pure substances that are not chemically combined.
substances held together by physical forces, not chemical
No chemical change takes place Each item retains its properties
in the mixture They can be separated physically
Chem4kids.com
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Mixtures vs. Compounds
http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/elements_com_mix_6.shtml
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Can you identify the following?
You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture.
Review:An element contains just one type of atom. A compound contains two or more different
atoms joined together. A mixture contains two or more different
substances that are only physically joined together, not chemically.A mixture can contain both elements and
compounds.
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Element, Compound, or Mixture?
Rocks
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Element, Compound, or Mixture?
Rocks
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Element, Compound, or Mixture?
Copper
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Element, Compound, or Mixture?
Copper
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Element, Compound, or Mixture?
Jelly Beans
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Element, Compound, or Mixture?
Jelly Beans
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Element, Compound, or Mixture?
Table Sugar
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Element, Compound, or Mixture?
Table Sugar
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Element, Compound, or Mixture?
Diamond
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Element, Compound, or Mixture?
Diamond
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Element, Compound, or Mixture?
Tea
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Element, Compound, or Mixture?
Tea
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Element, Compound, or Mixture?
Salt
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Element, Compound, or Mixture?
Salt
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Element, Compound, or Mixture?
Neon Gas
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Element, Compound, or Mixture?
Neon Gas
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Element, Compound, or Mixture?
Salad
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Element, Compound, or Mixture?
Salad
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Element, Compound, or Mixture?
Pure Water
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Element, Compound, or Mixture?
Pure Water
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Element, Compound, or Mixture?
Aluminum
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Element, Compound, or Mixture?
Aluminum
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Element, Compound, or Mixture?
Lemonade
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Element, Compound, or Mixture?
Lemonade
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Element, Compound, or Mixture?
Silver
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Element, Compound, or Mixture?
Silver
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Element, Compound, or Mixture?
Sand
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Element, Compound, or Mixture?
Sand
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NotesDetailed notes are located at:http://www.middleschoolscience.com/elements-compounds-mixtures-notes-isn.pdf
Flow Chart:http://www.middleschoolscience.com/matter-flow-chart-isn.pdf