22 Halloween Science Experiments
Unveiling the science behind the mysterious phenomena of glow sticks, dry ice, candies and even teeth you'll realize there's no need to be frightened! Dive into these Halloween-inspired experiments and unravel the secrets that lie beneath the surface!
Browse Halloween Science Projects
Check out all the different halloween projects with complete instructions and videos. They're great for students' science fair projects or a fun way for kids to learn science!
Place glow sticks in water from near-freezing to warm and discover the surprising tradeoff between brightness and how long they last.
Drop dry ice into a balloon and watch it inflate, then press a warm spoon against a chunk to hear it sing.
Add earthworms to half your pots, plant three types of seeds, and measure which group grows taller in just eight days.
Cut open different candies and classify them as rock or mineral models based on what the inside looks like.
Transfer glowing bacteria into test tubes and watch their light fade as you add everyday pollutants like hair gel and river water.
Chew a wintergreen Lifesaver in a dark room and watch sparks of white light flash between your teeth.
Bury carrots in different soil conditions and weigh them over time to measure how fast decomposer microbes do their work.
Add earthworms to half your pots and vary the watering to see whether worms help plants survive drought or overwatering.
Soak limestone in different sodas for a day and weigh what is left to find out which one dissolves the most.
Weigh teeth before and after soaking in Coca-Cola, Sprite, and root beer to see which soda erodes the most enamel.
Soak five teeth in coffee, tea, grape juice, red wine, and cola to discover which beverage leaves the darkest stain.
Soak real teeth in five strengths of phosphoric acid for a week and weigh them to see how much enamel each solution dissolves.
Charge glow-in-the-dark paint and drop a fizzy tablet into oil to create a lava lamp that glows without a black light.
Charge glow-in-the-dark stickers with four different lamps and discover which type of light keeps them glowing longest.
Fill an aquarium with carbon dioxide and blow soap bubbles into it to see them hover more than twice as long as bubbles in regular air.
Draw a glowing message with real ocean bacteria and watch it light up on an agar plate in the dark.
Shape a ball of dry ice and dirt into a model comet and watch real gas jets stream off its surface.
Use chocolate shavings and heat to build three types of model rock that match real geology.
Grow giant sugar crystals on a string and watch a supersaturated solution turn back into solid rock candy.
Reshape Starburst candies with heat and pressure to model how the Earth forms three types of rock.
Drip water onto a candy sitting on filter paper and watch hidden ink colors separate into colored rings.
Place a Life Saver on someone's tongue while they hold their nose and time how long it takes to name the flavor.
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