WARM UP - Loudoun County Public Schools · 2016-11-26 · What are some mixtures you see or use...
Transcript of WARM UP - Loudoun County Public Schools · 2016-11-26 · What are some mixtures you see or use...
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What are some mixtures you see or use every day?
WARM UP
1. Attendance 2. Agenda – Molecule Worksheet 3. Warm Up
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USE YOUR NOTES! FILL IN THE BLANKS!
Classifying Matter: Elements, Compounds, and Mixtures
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Compounds
A compound is a pure substance composed of two or more different elements joined by chemical bonds.
Has a chemical formula. The subscript (small number) tells you how many of that element are needed. Made of elements in a specific ratio that are always the same Can 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.
No chemical change takes place
Each item retains it’s own properties in the mixture.
They can be separated physically with time, or pressure.
Chem4kids.com
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The Science of Macaroni Salad
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Mixture vs. Compound
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Can you identify the following?
Tell me is the item in the photo is an
element, compound, or mixture.
(14 photos)
element : contains just one type of atom.
compound : contains two or more different atoms chemically joined together.
mixture : contains two or more different substances that are only physically joined together, not chemically.
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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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Classwork Time!