Babushka

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Babushkas Egg Experiment

• By
• Ms. Mendez

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Our Objective

• Students will learn about cause and effect
  relationships.
• In this case the importance of vinegar in color
  dye.
• Students will perform scientific experiments to
  investigate the importance of vinegar and other
  factors like temperature,the amount of color dye
  in solution.

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What standards does this lesson cover?

• This lesson plan would be perfect for fifth grade
  and higher, but you can always adapt it to your
  own level.

Fifth grade Students know differences in
chemical and physical properties of substances
are used to separate mixtures and identify
compounds.
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• h. Students know living organisms and most
  materials are composed of just a few elements.
• Eight Grade Standards
• d. Students know the states of matter (solid,
  liquid, gas) depend on molecular motion
• . Students know that in solids the atoms are
  closely locked in position and can only vibrate
  in liquids the atoms and molecules are more
  loosely connected and can collide with and move
  past one another and in gases the atoms and
  molecules are free to move independently,
  colliding frequently.

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Prior Knowledge and Motivation

• Make a chart with three columns Cause, Effect,
  Why do you think?
• Brainstorm on this subject with other
  objects.(I.e What causes the toy car to move?)
• While reading the story, ask questions that would
  help the student get prepared for the experiment.
  Use the scaffolding method of reading.

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THE EXPERIMENT
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GROUP ACTIVITY

• Place students into groups.
• Each group will have one factor
• Temperature
• Time
• Amount of dye used
• Each group should discuss how each factor can
  change the outcome.(The vinegar content stays the
  same).

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What students can do

• The teacher can place the cup in microwave for a
  few seconds. Place a second cup in a cooler place
  or in bag of ice.
• Children can test two eggshells, one in half the
  time needed. (3.5min) The other twice as much
  (10min)
• Children can add more or less dye and compare
  results.

• To change temperature
• Amount of Time
• Amount of dye

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Explanation

• The egg shell is primarily composed of Calcite
  (Calcite Carbonate CaCo3)
• The shell has an outer layer called the cuticle,
  which is 90 protein.
• When its placed under acidic conditions (such as
  vinegar dye solution) areas of the cuticle take
  on positive charge.

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• Food Coloring dyes may differ in brand but each
  contain at least one negative charge.
• This negative charge on the dye is attracted to
  the positive charge of the cuticle.
• -
• -
• -
• -

Egg
dye
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• The greater number of positive charges available
  on the surface of the eggshell the more dye it
  attracts. Causing an intense color on the shell.
• When no vinegar( or acid) is present the
  cuticles protein has fewer positive charges. As
  a result the shell is dyed only slightly.

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Good to Know
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• The attraction between () and (-) charges is the
  result of why dye molecules are attracted to the
  outside of the shell.
• These attraction chains become more intense over
  time.
• Therefore eggs dyed for long periods of time
  should have deeper colors because more reactions
  with the dye were made.

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• Cooling the solution should decrease the rate of
  reactions that occur in the dyeing process,
  results should be paler eggs.
• Increasing the temperature should increase the
  rate of reaction. The result, eggs with more
  intense color.

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• If theres more dye, theres more negative
  charges and a stronger attraction to the shell.
  Which will also give you deeper colored eggs.
• If the dye solution is more dilute there are
  fewer negative charges to adhere the positively
  charged shell, therefore the shells appear
  slightly colored.

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To Re-enforce Material

• Have students share their experiment information
  to the class. What changes occurred when the time
  frame was prolonged? Did the temperature of the
  solution affect the outcome?
• Have students write a letter to Babushka
  explaining in their own words why her eggs didnt
  come out the way she wanted them to.
• Review cause and effect, with what each group did
  in their experiments.

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