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Babushka’s Egg Experiment

Babushka’s Egg Experiment. By Ms. Mendez. Our Objective :. Students will learn about cause and effect relationships. In this case the importance of vinegar in color dye.

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Babushka’s Egg Experiment

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  1. Babushka’s Egg Experiment By Ms. Mendez

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. THE EXPERIMENT

  7. 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).

  8. To change temperature Amount of Time Amount of dye 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 othertwice as much (10min) Children can add more or less dye and compare results. What students can do

  9. 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.

  10. 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

  11. 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 cuticle’s protein has fewer positive charges. As a result the shell is dyed only slightly.

  12. Good to Know

  13. 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.

  14. 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.

  15. If there’s more dye, there’s 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.

  16. 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 didn’t come out the way she wanted them to. • Review cause and effect, with what each group did in their experiments.

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