======Glow Sticks at Different Temperatures======


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**Materials: **{{$demo.materials_description}}\\
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**Alternative titles:** Glow Sticks Temperature Effects
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====Summary====                   
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====Procedure====  
  - Snap and shake three glow sticks of the same color to activate them.  
  - Place one glow stick in a container of hot water.  
  - Place the other glow stick in the freezer or in a container of ice water.
  - Keep one at room temperature as a control. 
  - Wait a few minutes.  
  - Remove the glow sticks and compare their brightness and glow intensity.  
  - Optionally, swap their environments (move the frozen one into hot water) and observe the changes.



====Links==== 
Glowstick Demonstration (Kinetics) - chemistryinaminute: 
{{youtube>XD25Qk43WU8?}}\\

How Does Temperature Affect Glowsticks? - Thompson STEM Engagement: 
{{youtube>UIWc4paARIY?}}\\

📄 Glow Stick Experiment with Chemiluminescence Science - Little Bins for Little Hands: [[https://littlebinsforlittlehands.com/glow-stick-experiment-chemiluminescence-science/]]\\



====Variations====
  * Test glow sticks in different temperature water (room temperature, warm, very hot, or icy cold).  
  * Try different colors of glow sticks to see if some respond more strongly to temperature changes.  
  * Measure how long glow sticks last at each temperature.  
  * Leave one in the freezer overnight to test if the glow lasts longer.



====Safety Precautions====
  * Do not cut open glow sticks—chemicals inside are not safe to touch or ingest.  
  * Use caution with hot water to avoid burns.  
  * Dispose of used glow sticks responsibly; do not put them in the microwave or dishwasher.  
  * Supervise children during handling.




====Questions to Consider====
  * Why does the glow stick in hot water shine more brightly? (The reaction rate increases with heat.)  
  * Why does the glow stick in the freezer glow more dimly but last longer? (The reaction slows down.)  
  * How does this demonstrate the effect of temperature on chemical reaction rates?  
  * What happens if you return the frozen glow stick to warm water?  
  * How does chemiluminescence differ from light produced by heat, like a candle or a bulb?