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20 of Our Favorite Halloween Science Experiments

by 100IQ Win The Knowledge

Halloween is the perfect occasion to try some spooky, creepy, candy-centered science experiments! Here, we’ve rounded up 20 hands-on Halloween science experiments that explore concepts such as the scientific method, osmosis, exothermic reactions, and more.

Source: Epic Fun for Kids

There are gobs of recipes out there for DIY slime, but this recipe has an added element your students will love: bubbles! (Shh … the secret ingredient is xanthan gum.)

clear plastic gloves filled with plastic halloween toys and frozen water

Source: Happy Hooligans

This fun activity will teach your students about the effect of salt on frozen water. They will make observations as the creepy hands melt and colorful Halloween toys emerge from the slush.

an articulated hand science experiment

Source: De Tout et de Rien

Play Frankenstein in your classroom and teach your students to engineer their own articulated hands using construction paper, straws, string, and hot glue.

a collage of science beakers overflowing with green foam

Source: Little Bins for Little Hands

Create a cool Halloween-themed chemical reaction that is just as much fun to play with as it is to learn from with this exothermic chemical reaction using hydrogen peroxide and yeast.

young girl with science glasses looking at vials of candy potions

Source: Housing a Forest

Let your little scientists loose as they play Mad Scientist … mixing, dumping, shaking, pouring, and experimenting to create their own magic potions from Halloween candy.

a decomposing pumpkin

Decomposition, or rotting, is the process by which organic substances are broken down after death. Eventually, decomposition breaks organic matter down so that it becomes part of the soil again. And what better tool for this lesson than an old Jack-O-Lantern?

Source: Gift of Curiosity

sprouting indian corn

Source: De-Tout-et-de-Rien

Explore germination with this fun experiment using dried flint corn, a shallow basin, and water.