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You are here: Home / Education / Glow stick experiment

Glow stick experiment

October 30, 2015 by Lisa Grable 8 Comments

Glow sticks are easy to find in many colors around some of the holidays. What a great time for an energy glow stick experiment that demonstrates chemical and physical principles.Glow stick experiment uses thermal energy from hot and cold water to show differences in fluorescence. Kids love glow stick activities!

Safety note: Be sure to explain safety precautions to children. This experiment uses hot water. Skin protection should be used. Avoid getting chemicals from the the inside of the glow stick on skin, eyes, or clothing. After these experiments dispose of glow sticks in garbage. Disclaimer: All information provided on this site is for entertainment and education purposes only. Using any information from thecasabouquet.com is at your own risk.

Instructions

  • glow-sticks - 1Give the children two cups and 2 or 3 glow sticks of the same color. You may want to use coffee cups to help with insulation. If you have several teams of students, try giving each team a different color glow sticks to work with for comparison.
  • Ask the children to make observations of the glow stick and sketch the inside of the stick.

glow-sticks-ampule

  • Distribute water and ice cubes and water that is close to boiling. Record the temperature of each cup.glow-sticks-glowing
  • Bend the glow sticks (to break the ampule inside) and make observations. Put one stick in the hot water and one in the cold (if you have a 3rd stick, leave it on the table for room temperature). Observe and record the color and amount of light.glow-sticks - 7
  • Turn off the lights and observe. You may also want to try a black light for more observations.Glow stick experiment uses thermal energy from hot and cold water to show differences in fluorescence. Kids love glow stick activities!

What questions can you answer with an experiment like this? Do different color glow sticks behave differently with temperature changes? Can you detect a difference in brightness between different temperatures of water, between 0oC and 100oC? What happens if you switch the sticks from the two cups? How long will a glow stick give off light in the freezer, or room temperature, or in hot water? Can you think of more?

Supplies

  • Safety glasses,
  • 2 cups,
  • 2 or 3 glow sticks,
  • very hot water,
  • water with ice,
  • paper towels,
  • paper or notebook for recording results, pen

glow-sticks - 3A tip for teachers: I did not have hot tap water or a microwave available in my classroom. I tried to use the old immersion heating coil that is relatively inexpensive. I found it dangerously hot to use around children and it shorts out easily. My favorite was a plug in teakettle. It costs a bit more, but is safer, long lasting, and portable.

 

What is the science?

Content: thermal energy, chemical reaction, fluorescence

Light sticks are examples of luminescence and fluorescence. The chemical reaction that starts when you break the glass ampule in the lightstick releases enough energy to cause the electrons in the fluorescent dye to get excited. Immediately these electrons drop back down to their normal state and give off energy in the form of light. In this experiment you are using the thermal energy of the hot and cold water to change how quickly the reaction happens.

C14H10O4 (diphenyl oxalate) + H2O2 (hydrogen peroxide) –> C6H5OH (phenol) + C2O4 (peroxyacid ester)horizontal bar with plumeria

Resource links

  • http://www.need.org/Files/curriculum/guides/IntScienceofEnergy.pdf
    • Science of Energy from need.org has a whole set of energy lab activities and worksheets
  • http://hubpages.com/hub/Fun-Things-to-do-with-Glow-Sticks
    • Fun things to do with glow sticks from Hub Pages
  • http://kidsactivitiesblog.com/58817/glow-dark-hacks-must-haves
    • 25+ Glow in the dark hacks and must-haves from Kids Activities Blog
  • http://www.stevespanglerscience.com/blog/2012/07/03/the-dangers-of-glow-sticks-always-follow-safe-science-warnings-and-precautions/
    • Safety information on glow sticks from Steve Spangler Science
  • http://www.compoundchem.com/2014/10/14/glowsticks/
    • The chemistry of glow sticks from Compound Interest
  • http://chemistry.about.com/od/howthingsworkfaqs/a/howlightsticks.htm
    • How do lightsticks work? From About Education
  • http://www.vernier.com/products/sensors/temperature-sensors/
    • Temperature sensors from Vernier Software & Technology

horizontal bar with plumeriaLet’s talk story

I’ve found that children love wearing glow sticks on a necklace or the thin bracelet kind. This experiment has a good excitement value. So make a point to stock up on glow sticks when they are abundant and colorful, such as at Halloween and July 4th!

I’ll be looking for comments below, or contact me at lisa [at] thecasabouquet[dot]com.

Affiliate links:  if you make a purchase using these links, I’ll receive a small compensation towards maintaining this blog, at no extra cost to you.

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Filed Under: Education, Science Tagged With: chemical reaction, energy, energy experiment, fluorescence, glow stick activities, glow stick experiment, temperature, thermal energy

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Reader Interactions

Comments

  1. marilyn1998

    August 12, 2019 at 11:28 am

    Thank you for sharing at #ThursdayFavoriteThings. Pinned and shared. Have a lovely week. I hope to see you at next week’s party too!

    Reply
  2. marilyn1998

    August 10, 2019 at 8:27 pm

    Thank you for sharing at #OverTheMoon. Pinned and shared.

    Reply
  3. Mother of 3

    August 26, 2016 at 8:22 pm

    What a fun experiment idea. Pinned!

    Reply
    • Lisa Grable

      August 27, 2016 at 12:27 pm

      Thanks for the pin! I hope your children enjoy it. Kids like adding a black light flashlight, too!

      Reply
  4. michelleoblogoff

    August 24, 2016 at 11:28 pm

    Really cool experiment!
    Thanks for sharing!
    Michelle

    Reply
    • Lisa Grable

      August 26, 2016 at 6:59 am

      Thanks, Michelle! It’s fun to compare colors, too!

      Reply
  5. Leah Courtney

    June 5, 2016 at 4:10 pm

    We love glow sticks. This looks like fun. 🙂

    Reply
    • Lisa Grable

      June 5, 2016 at 7:15 pm

      I hope you all enjoy doing an experiment with something that is so much fun! Thanks for coming by.

      Reply

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Lisa Grable, Casa BouquetI’m an educator, grandmother, classic movie fan, sewer and crafter, and I love Hawaii. Read more about me …

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