Mixtures

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Mixtures
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Look at the pictures
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(No Transcript)
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Other examples for teacher

• Air (N2, O2, CO2, Ar, other gases) gas in gas
• Soda pop (CO2 in water) gas in liquid
• Sea water (NaCl and other salts in water) solid
  in liquid
• Dental amalgams (mercury in silver) - liquid in
  solid
• Alloys (brass, (Cu/Zn), solder (Sn/Pb) solid in
  solid

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• Answer following questions
• What is different on this picturer?
• What substances are this mixtures?
• Write a componets of this mixtures.
• How to prepare homogenized milk and mayonnaise?
• What conditions are necessary for origine this
  mixtures?

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What is on the pictures? Think Mix them and say
what will originate?
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• Students experiment
• Take two of these materials and mixed them and
  say what originate from them (students make).
• Teachers experiment (frontal experiment)
• a) Sulphur and iron mixed and separated by
  magnet
• b) Sulphur and iron mixed, heat up
• Discuss about conditions, colours, phases, etc.

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Description for teachers

• The student will learn about different types of
  mixtures
• Vocabulary mixture
• 1 solution, solute, solvent
• suspension
• emulsion
• colloid
• 2 Homogenous
• Heterogeneous

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Teacher Background

• A mixture is a combination of substances. All
  solutions, suspensions, emulsions, and colloids
  are types of mixtures.
• A solution is a liquid that contains a dissolved
  substance solid, liquid, or gas. The solvent is
  the liquid in which the substance is dissolved.
  The solute is the substance dissolved in the
  liquid. Solutions do not have to be liquid. There
  are also solid solutions, such as glass, and
  gaseous solutions, such as air.An emulsion is a
  suspension of small globules of one liquid in
  another. Water is a polar substance. Water is
  miscible with other polar liquids which dissolve
  in water. Oil is a nonpolar substance. Oil is
  miscible with other nonpolar liquids which
  dissolve in oil, but not all oils dissolve in
  each other. Oil and water do not mix they are
  immiscible they make an emulsion.A suspension
  is a mixture of a solid in a liquid where the
  solid does not dissolve in the liquid but stays
  temporarily suspended in the liquid until gravity
  pulls it down.A colloid is a solution
  containing tiny undissolved particles that
  permanently remain suspended in the liquid, such
  as homogenized milk and mayonnaise.

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Game

• Assort name of mixtures and mixtures.

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• Experiment
• Use microscope and observe this mixtures.
• Write the characteristics of this mictures
  (colour, texture, structure, components, etc.).

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Practical use
Most foods, and even cosmetics are mictures of
one type mentioned above or the other. They are
made of different substances that when put
together.
Find examples of mixtures in practical live. (Use
TV, web, )