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Composition of Matter

Chapter 18 (Physical Science with Earth Science) [Glencoe Science] Classification of Matter.

Mr Kekic

on 8 October 2013

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Transcript of Composition of Matter

Homogenous Mixture
Mixtures made of different materials that CANNOT be easily distinguished. (Blended Evenly)
Example: Vinegar (Acetic acid/Water)
Solution: A homogeneous mixture of particles so small that they will never settle to the bottom of the container.
Example: Kool-aid
Pure substance in which the atoms of two or more elements are combined in a fixed proportion.
Made of Molecules (2 or more atoms bonded together)
Examples: Water, Salt, Carbon Dioxide.
Heterogeneous Mixture
Anything that has mass and takes up space
Can be either pure or a mixture.
You here. You have mass. You take up space. You matter!
Pure Substance
Have fixed compositions
Made of ONLY be an element or a compound!
Pure substance made of all the same atoms
About 90 elements found in nature
About 20 others are man made
Examples: Copper, Carbon, Oxygen`

Made of two or more substances that can be easily separated by physical means.
Not always equal proportions.
Mixtures made of different materials that can be easily distinguished.
Examples: Shirts (Cotton and Polyester blend)
Cheese, Granite, Italian Salad Dressing
Like heterogeneous mixture: Contains mixture of different materials
Like solution: Particles not heavy enough to separate out.
Examples: Milk (Fat, Proteins, Water)
Blood: cells, plasma
Heterogeneous mixture containing a liquid in which particles eventually settle.
Example: Muddy Water

Testing Colloids
Tyndall Effect: Colloids scatter light as it passes through.
Learning Target
I will be able to identify whether a substance is a mixture or a pure substance.
I can describe the difference between a heterogeneous and homogeneous mixture.
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