======Dry Ice Film Canister Rocket======


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**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:** Dry Ice Rocket Rainbow
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====Summary====                   
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====Procedure====  
  - Put on safety glasses and thick gloves for handling dry ice.  
  - Place a sheet of white poster board outdoors to catch the splatter pattern.  
  - Add 1–2 drops of food coloring to each film canister and fill halfway with water.  
  - Break a small piece of dry ice and carefully drop it into one canister.  
  - Quickly snap on the lid, turn the canister upside down, and set it on the poster board.  
  - Step back and watch the rocket launch into the air.  
  - Repeat with different colors to create a rainbow pattern of splatters.



====Links==== 
Dry Ice & Film Canister - Dumbo: 
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📄 Dry Ice Rocket - The Science Kiddo: [[https://sciencekiddo.com/film-canister-rocket-with-dry-ice/]]\\

====Variations====
  * Try different amounts of dry ice to compare launch times and heights.  
  * Use hot water versus cold water to test sublimation speed.  
  * Arrange canisters in different patterns to create unique splatter art.



====Safety Precautions====
  * Always wear safety glasses.  
  * Handle dry ice only with thick gloves or tongs to prevent frostbite.  
  * Conduct outdoors in an open area to avoid injury or mess.  
  * Stand back immediately after sealing the canister, as launch is unpredictable.  
  * Do not use sealed containers that cannot safely release pressure.




====Questions to Consider====
  * What happens to dry ice as it turns into gas? (It sublimates, changing directly from solid to gas.)  
  * Why does the pressure build inside the film canister? (Gas from sublimation is trapped, pushing against the lid until it pops off.)  
  * How does water temperature affect the speed of the launch? (Hot water speeds sublimation and makes launches quicker, while cold water slows the process.)  
  * Why is a film canister a good choice for this experiment? (Its lid seals tightly but can still pop off safely under pressure.)