MIXTURES and SOLUTIONS

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MIXTURES and SOLUTIONS
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PROPERTYThe characteristics of a substance
(matter) that by using our senses can be observed
such as color, size, shape, texture, temperature,
odor, sound, taste, etc.
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Investigating solid materialsUsing your sight,
smell, hearing and sense of touch list the
properties of the three solid materials.WE DO
NOT TASTE ANYTHING UNLESS SPECIFICALLY TOLD TO.
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Record your observations List the
characteristics of the three solid materials in
three columns in your journal.
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Properties of three solids
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PROPERTY CHARTDraw and label a chart in your
journal then fill it in.
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MATERIALS NEEDED

• Two hand lenses
• One half liter container
• One syringe
• One of each of the cups
• labeled G, P, S.
• One level spoonful of the corresponding material
  in each cup
• One level spoonful of gravel in the G cup.
• One level spoonful of powder in the P cup.
• One level spoonful of salt in the S cup.

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PREDICTINGWrite in your journal what you think
might happen if you add water to each cup
containing the dry materials.When we add water
to gravel, I think ______________________________
__ will happen. When we add water to salt, I
think ________________________________ will
happen. When we add water to powder, I think
________________________________ will happen.
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Record in your journal what you observed when
water is added to each of the materials
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When you put two or more materials together you
make a MIXTURE
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PREDICTING Write in your journal how you think
you can separate the materials in each of the
three mixtures.To separate the gravel, powder
and salt, I think ______________________.
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SEPARATING THE MIXTURESMake a chart in your
journal to record the results.
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SEPARATING THE MIXTURES

• Place a screen over an empty cup.
• Stir the mixture thoroughly.
• Pour the mixture through the screen filter.
• If the screen filter doesnt separate the
  mixture, repeat the process with a filter paper.
• Record the results on your chart.

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If the solid material in a mixture seems to
disappear in a liquid, and the mixture cant be
separated from the water with a filter, it is a
special kind of mixture, called a SOLUTION. Salt
disappears or DISSOLVES in water to make a
saltwater solution. To separate a dissolved
substance from the liquid, the liquid must be
evaporated.
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A salt-water solution is made of two parts the
water and the salt. These two parts of a
solution are called the solvent and the solute.
The solvent is the material into which the solid
material goes. The solute is the material that
dissolves. A solution is always made of a
solvent with some kind of solute dissolved in it.
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You separated the gravel/water mixture and the
powder/water mixture with paper filters and/or
screens.How can a salt/water solution be
separated? Write a prediction in your
journal.I predict a salt/water solution can (or
cannot) be separated by (or because)
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What are the properties of a salt crystal?
Answer
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Answer the following six ques-tions in your
journal (rephrase the question in your
answer)1. What is a mixture? Give examples.2.
What is a solution? Give examples.3. Is salt
and water a mixture? A solution? Is it both a
mixture and a solution?4. How do you know when
a solid and a liquid form a solution?5. How can
mixtures be separated?6. How are screen filters
and paper filters alike? How are they different?
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Write concluding paragraphs explaining what we
did in this investigation. Start with a topic
sentence. Make sure to give details about which
mixtures were or were not separated by the paper
filter and /or the screen and what it means if
they arent. Include how the paper filter and
the screen are similar and how they are different.
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MIXTURES SOLUTIONS WORD BANKMIXTURE - two
or more materials stirred (mixed)
together.PROPERTY- a characteristic of an
object, something you can observe such as size,
color, shape, texture, temperature, etc.SOLUTION
- a special mixture formed when a material
dissolves in water.DISSOLVING - the process in
which one material disperses uniformly into
another material, so that the first material
seems to disappear.
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Properties of a salt crystal

• Square four equal sides, four right angles
• Mostly transparent with hints of white
• An X through the middle