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======Dry Ice Frozen Bubbles======


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/* GREY BOX INFORMATION - Required                                                                     */
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<WRAP right box>
**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Categories:** {{$demo.categories}}
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**Alternative titles:** Make Frozen Bubbles
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/* SUMMARY - Required                                                                                  */
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====Summary====                   
{{$demo.summary}}


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/* PROCEDURE - Optional                                                                                */
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====Procedure====  
  - Put on gloves to handle dry ice safely.
  - Place a chunk of dry ice into the bottom of a clear glass bowl or a cardboard box.
  - Wait about five minutes for carbon dioxide gas to collect inside the container.
  - Blow bubbles gently into the container so they fall into the carbon dioxide layer.
  - Watch as bubbles float at the air–carbon dioxide boundary, then sink as they cool.
  - Observe bubbles that touch the dry ice or sink to the bottom—they will freeze solid.
  - Pick up frozen bubbles to examine them before they thaw and burst.


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/* Links - Optional                                                                                    */
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====Links==== 
Student Demonstrations Project - Sully Science: 
{{youtube>G_JqLarNxFE?}}\\
📄 Make Frozen Bubbles - ThoughtCo.: [[https://www.thoughtco.com/frozen-bubbles-with-dry-eyes-project-602194]]\\


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/* VARIATIONS - Optional                                                                               */
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====Variations====
  * Try using different bubble solutions (store-bought vs. homemade).
  * Shine a flashlight or laser pointer on frozen bubbles to see color effects.


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/* SAFETY PRECAUTIONS - Required                                                                       */
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====Safety Precautions====
  * Always wear gloves when handling dry ice to avoid frostbite.
  * Use only under adult supervision.
  * Do not touch dry ice directly with bare skin.
  * Ensure good ventilation since carbon dioxide gas will accumulate in the container.
  * Do not enclose dry ice in a sealed container.
  * Students must not remove dry ice from the demonstration area.


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====Questions to Consider====
  * Why do bubbles float on carbon dioxide gas before sinking?
  * What causes the bubbles to freeze when they touch the dry ice?
  * Why do the colors of the bubbles change as they age?


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/* DEMONSTRATION INFORMATION - Required                                                                */
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/* Complete information in the Demonstration Info box below, following instructions exactly. */