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5 Easy Halloween Science Experiments for Spooky Middle School Chemistry

Halloween is my favorite holiday of the year and I love bringing in some Halloween science experiments for some spooky chemistry into my classroom! Whether it’s bubbling potions or eerie color changes, these activities captivate my students and help keep them engaged during the long month of October between school holidays. In this post, I’ll share five hands-on Halloween-themed chemistry experiments that will get your students asking for more.

fall chemistry science activities

# 1. Spooky Slime Creation

Who doesn’t love slime? This activity is a fun way to introduce students to polymers and non-Newtonian fluids. It’s a great activity between your states of matter unit and chemistry unit on polymers to get them thinking outside the box about what they already know. To get started, you’ll need white school glue, baking soda, contact lens solution, and food coloring. For an extra spooky twist, consider using Elmers glow-in-the-dark glue.  (Disclaimer: this can get messy so you will want to make sure to do this activity with students you trust)

fall chemistry science activities spooky slime creation

Basic Idea:

I like to have my students state their answer using the claim, evidence, reasoning explanation.  This is a perfect time to introduce non-neutonian fluids and why it is important to think outside the box and think beyond what they are taught in school.

# 2. Bubbling Cauldrons with Dry Ice

The first unit I teach is states of matter and phase changes.  The phase changes section occurs at the beginning of September which is a great time to find dry ice before it is all gone for Halloween parties. You can create “bubbling cauldrons” using dry ice, to help your students learn about sublimation. All you need is dry ice, warm water, dish soap, food coloring, and a large container.

fall chemistry science activities bubling cauldrons

Basic Idea:

What I like to do is have a piece of dry ice on the table by itself so they can see sublimation in action without being speed up with the addition of water.  Last year I found a clear skeleton head planter that I use instead of the cauldron and that had an even greater impact because they could see the whole process.

# 3. Color-Changing Potion

This activity explores acid-base reactions with a color-changing potion. You’ll need red cabbage juice, baking soda, vinegar, and clear cups or beakers. (This can also be done with bromthymol blue instead of red cabbage juice)

fall chemistry science activities color changing potion

basic idea

To extend this you can pour the vinegar solution into the baking soda solution to watch the color change again. You can also test different liquids like lemon juice and soap and have the students predict what color they will change.

# 4. Glow-in-the-Dark Reactions

Fall is the perfect time to find glow sticks at your local dollar store. In this activity we are testing the hypothesis that glow sticks glow brighter and longer in colder temperature than warmer temperature.

fall chemistry science activities glow in the dark reactions

BAsic idea :

You could also test it so that one is placed in the freezer, one in the classroom, and if you live in a warm climate, put one outside.  Then check the next day to see if they are still glowing and the brightness they are glowing at.

# 5. Foaming Jack-O’-Lanterns

If you are looking for a fun demonstration to do on Halloween when the students are already crazy with the Halloween spirit, then you’ll want to do the foaming jack-o’-lanterns. You’ll need a carved pumpkin, hydrogen peroxide, yeast, dish soap, food coloring, and a tray large enough to hold the pumpkin.

fall chemistry science activities foaming jack o lanterns

basic idea:

You can have the students determine if a chemical reaction occurred and explain how they know using a claim, evidence, reasoning explanation paragraph. You could also play around with different amounts of hydrogen peroxide to dish soap ratios to see if that effects the reaction.

These five Halloween science experiments for middle school chemistry are great for the fall season. Not only will your students have a great time, but they’ll also gain a deeper understanding of chemistry concepts that they can connect to the real world. I’d love to hear how these experiments go in your classroom!

For more fun and science activities, check out these other Halloween science projects.