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Halloween is a natural hook to get students engaged in science lessons. Sugar, pumpkins, shadows, and sound effects all give them something familiar to investigate, test, and explain.
Use these Halloween science activities to bring seasonal energy into STEM lessons without losing the learning goal. You’ll find hands-on experiments, life science text sets, and multimodal videos and simulations for different grade bands.
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[Create Halloween activities with Newsela STEM for your chance to win](id-contest)
[Start with hands-on Halloween science activities](id-experiment)
Key Takeaways
●Start with the observable effect. Students can watch liquids separate, colors shift, or crystals grow before they explain the science behind what happened.
●Match the activity to the concept. Lava lamps fit mixtures, density, and reactions; ghostly illusions fit vision and light; rock candy fits crystallization.
●Use readings to extend the experiment. Companion Newsela resources help students move from “that was cool” to a clearer explanation of why the effect happened.
Halloween experiments work best when the spooky hook leads to a clear science question. Students can investigate mixtures, after-images, and crystallization through hands-on activities that connect seasonal fun to real STEM concepts.
How can students create a spooky lava lamp?
A lava lamp activity works for Halloween science because they’re a little funky, a little spooky, and a lot sciency. Oil and water separate, food coloring moves through the mixture, and the carbon dioxide bubbles carry the “lava” through the jar.
Halloween science activity
Spooky lava lamp science activity
Use this hands-on STEM activity to help students observe how oil, water, food coloring, and an antacid tablet interact, then explain the science behind the lava-lamp effect.
Investigation question
Why do the liquids in a lava lamp separate, and what makes the bubbles move?
Quick materials check
Jar or beakerCooking oilWaterFood coloringFizzing antacid tabletsOptional small Halloween accessories, like plastic spiders or bugs
01
Build
Have students follow the Halloween Lava Lamp activity directions to set up the jar, liquids, food coloring, and antacid tablet.
02
Observe
Ask students to note which liquids mix, which separate, which seem thicker or thinner, and how the bubbles move through the jar.
03
Explain
Guide students to connect their observations to viscosity, density, mixtures, and the carbon dioxide released during the reaction.
04
Extend
Use the supporting Newsela readings to help students explain why the lava lamp effect happens and build science vocabulary.
Supporting resources
Spooky lava lamp resources
Use the activity as the hands-on anchor, then add the companion readings to help students explain what happened using science concepts.
Use to reinforce the science vocabulary students need to explain why the liquids separate.
390L–1190L
✓Yes
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How can students test their senses with ghostly illusions?
Students can test their senses by making a ghostly after-image and then using science to explain why the image seems to linger or change color. This Halloween science activity turns a spooky visual effect into a lesson on light, vision, and how the brain processes what the eye sees.
Halloween science activity
Ghostly illusion science activity
Use this hands-on STEM activity to help students create a spooky after-image, observe how their eyes respond to color, and explain how photoreceptors affect what they see.
Investigation question
Why can your eyes still “see” an image after you stop looking at it?
Quick materials check
Several sheets of white paperBrightly colored markers
01
Build
Have students follow the ghostly illusion activity directions to create a brightly colored image they can stare at and test.
02
Observe
Ask students to look for what appears on the blank paper after they stop looking at the original image.
03
Explain
Guide students to connect the after-image to rods, cones, color signals, and what happens when some cones get tired.
04
Extend
Use the supporting Newsela readings to connect the illusion to vision, light, and the science behind spooky experiences.
Supporting resources
Ghostly illusion resources
Use the activity as the hands-on anchor, then add the companion readings to help students explain the science behind the after-image.
Use to extend the lesson from vision science into why people enjoy spooky or startling experiences.
470L–1070L
✓Yes
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How can students make rock candy while studying crystallization?
Making rock candy is a Halloween-friendly way to slow down and watch chemistry happen over time. As sugar molecules bond and build on seed crystals, students can connect the treat they’re making to crystallization, nucleation, and changes in solutions.
Use the activity as the hands-on anchor, then add the companion readings to help students explain why sugar crystals form and why our brains respond so strongly to sweet foods.
Halloween science activity
Rock candy crystallization activity
Use this hands-on STEM activity to help students observe how sugar crystals form, then connect their observations to nucleation, seed crystals, and the chemistry of sugar.
Investigation question
How do tiny sugar crystals grow into larger rock candy crystals?
Quick materials check
Granulated sugarGrill skewersClear plastic cupsLarge pot that holds at least 4 quartsMeasuring cupsTransparent tapeFood coloringRoll of paper towelsNitrile or latex glovesSmall digital scale
01
Prepare
Have students follow the rock candy activity directions to set up the materials and prepare for the crystallization investigation.
02
Seed
Ask students to notice how sugar clings to the wet skewer and becomes a starting point for larger crystals to grow.
03
Observe
Have students track the crystals over the next few days and record what changes as more sugar molecules attach.
04
Explain
Guide students to connect the growing crystals to nucleation, seed crystals, and the way sugar molecules form a larger structure.
Supporting resources
Rock candy resources
Use the activity as the hands-on anchor, then add the companion readings to help students explain how sugar crystals form and why sugar tastes sweet.
Use to extend the activity into a discussion about why the brain responds to sugar.
370L–940L
✓Yes
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[Take a candy-themed virtual STEM field trip](id-trip)
A candy-themed virtual field trip can give students a lighter Halloween-adjacent STEM connection without doing a hands-on experiment. Use the M&M Factory tour as the hook, then have students examine the candy’s history, create a timeline, and test what they've learned with a Formative quiz.
This is a great choice for a short cross-curricular activity. It’s not as directly “Halloween science” as the hands-on experiments, but it lets them explore science, history, media literacy, and timeline math.
Candy-themed virtual STEM field trip
Use this short activity to connect candy, history, timelines, and informational reading during the Halloween season.
Lesson goalStudents explore how M&Ms are made, choose key moments from M&M history, and use a timeline to organize what they learned.
[Investigate Halloween biology and the human body](id-body)
Key Takeaways
●Start with a spooky biology question. Skeletons, vampires, and zombies can lead students into body systems, blood, and animal adaptations.
●Keep the work evidence-based. Have students highlight, compare, explain, and create from the texts—not just react to the Halloween hook.
Skeletons, vampires, and zombies make for effective Halloween biology lessons because they begin with wacky questions and then lead students to evidence. What helps the body move? Could a human survive on blood? Could zombie-like science exist outside fiction?
Could the human body move without a skeleton?
You can turn familiar Halloween creatures into real questions about body systems. What would movement look like without bones? Students start by responding to the prompt, then use readings about muscles, bones, and tissue to review or support their thinking.
Skeletons, muscles, and movement mini lesson
Use this lesson to help students connect a Halloween skeleton question to how bones and muscles work together.
Lesson goalStudents use Newsela readings to explain how muscles and bones work together to help the body move.
Lesson question
Would you still be able to move your body without a skeleton? Why or why not?
Student tool
Use the Notice, Wonder, Connect worksheet during and after reading so students can track observations, questions, and personal connections.
Core reading
Have students read the two core resources on the strongest muscle and how bones and muscles work together, then use their notes to revisit the lesson question.
Extend
If time allows, students can read about the three types of muscle and facts about muscle tissue to deepen their explanation.
Show learning
Ask students to choose one type of muscle and create a one-minute video explaining what it looks like, where it’s found, and what it does.
Use to give students more details for explaining where muscles are found and what they do.
400L–1080L
✓Yes
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Could real-life vampires survive on blood?
This investigation blends a little science fiction with a little “what if?” Students can start with what they think they know, read about why a human “vampire” probably couldn’t survive on blood alone, then revise their thinking with evidence.
Compelling Question
Could a human vampire actually exist in real life?
01
Write the first headline
Have students use the Headlines worksheet to summarize what they think they know before reading.
This high school lesson asks students to choose two articles from a zombie-themed text set, highlight scientific information that supports the key questions, and then turn what they learn into a one-pager final product.
Designed by educator Sarah Rogers, this activity maintains the spooky premise while incorporating evidence-based exploration.
High school science activity
Zombie science reading task
Use this text-set activity to help students test zombie lore against scientific evidence, then synthesize what they learn in a one-pager.
1. Start with the questions
Before students choose their readings, frame the activity around the three questions they’ll use to guide their evidence gathering.
Are zombies real?
Could there be a real zombie outbreak?
What can we learn from zombie lore?
2. Choose two readings
Zombie science readings
Have students choose two articles from the text set. The goal is not to read every option—it’s to collect enough evidence to answer the questions thoughtfully.
Use to extend the idea of “zombie” phenomena into Earth and environmental science.
500L–930L
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3. Annotate in two passes
Students should use two Newsela highlight colors so their notes separate evidence from the story or lore connection.
Yellow highlight
Mark scientific information, including facts, examples, or explanations that help answer the compelling questions.
Red highlight
Mark zombie-lore connections, including details students want to test, question, explain, or use in their final one-pager.
4. Create the one-pager
Students use their annotations to create a colorful one-pager that shows what they learned about “zombies” and what the science can actually support.
Creative title that connects to the zombie science question.
Important quotes, ideas, and facts from both selected readings.
Images or visuals that help explain the scientific connection.
Reflection or personal connection that shows what students now think about zombie lore.
[Study spiders and bats with spooky animal science](id-animal)
Key Takeaways
●Use the animal hook for adaptation questions. Spider webs, spider behavior, and bat echolocation all give students a concrete science question to investigate.
●Give students a response task. KWL charts, reflection prompts, quizzes, and article choices help turn the Halloween theme into evidence-based reading.
Spiders and bats can be entry points into animal science that fit the season. Students can explore spider webs, ecosystems, and adaptations like echolocation. They can dig into these topics and observe, explain, and find evidence in the readings.
Why don’t spiders get tangled in their webs?
If spider webs are sticky, why don’t spiders get stuck in them? Students can try to answer this question by using a KWL chart to get their ideas down, then exploring the readings to find evidence to support or refute their ideas.
Spider web inquiry routine
Guide students from an initial prediction to evidence-based reflection about how spiders move through their own webs.
1
Ask and predict
Have students respond to the question, “Why might spiders not get tangled in their webs?” before they read.
2
Track what students know
Use the KWL Chart so students can record what they know, what they wonder, and what they learn.
3
Reflect after reading
After students read, use the Reflect and Respond worksheet to return to the original spider-web question.
Reading options
Spider web science readings
Start with the Everyday Mysteries article, then add the two extension readings if students have time to keep investigating spider webs and spider behavior.
Use to extend the lesson into the structure and strength of spider webs.
360L–1000L
✓Yes
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Why are spiders important?
Spiders give students a way to investigate how animals fit into ecosystems, how structures like webs support survival, and how scientists study behavior that may seem strange at first.
Use this grades 2–5 text set with a KWL chart. Students choose at least two articles, highlight information about why spiders are important, complete the article quizzes, and finish the chart with what they learned.
Use to extend the discussion from natural spider silk to human-designed materials inspired by spider science.
350L–1000L
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How do bats use echolocation and other adaptations?
Studying bats brings Halloween scariness together with real animal adaptations. Start with echolocation. Bats use sound waves and returning echoes to navigate and find prey. This gives students a concrete way to connect sound, behavior, and survival.
Reading options
Bat adaptation readings
Use these readings to help students investigate how bats navigate, respond to their environment, cooperate, choose habitats, and survive.
Use to show how scientists and caretakers respond when a bat’s survival is at risk.
1120L
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[Explore pumpkin science with observations and evidence](id-pumpkin)
Pumpkins are a fun Halloween hook, but giant pumpkins make for an even more exciting STEM investigation. Students can look closely at giant pumpkin competition images, read about how growers choose seeds and control the growing environment, then make an evidence-based claim about what matters most.
Lesson resources
Giant pumpkin observation and evidence set
Use these linked resources to help students observe giant pumpkins, read about how growers produce them, and explain which growing factor matters most.
Observe the pumpkins
Start with competition images so students can notice scale, compare winners, and generate questions before reading.
Teaching about the Halloween-night moon can turn a simple seasonal image into a real science question. What makes the moon shine? Why does its shape seem to change throughout the month? Students can observe the moon through images, then use multimodal content to understand its behavior before they build their own model.
STEM Lab Sequence
Moon phases cookie model
Use a Halloween-night moon hook, source evidence, and a simple cookie model to help students explain why the moon appears to change shape.
Investigation question
How can you model the phases of the moon?
Materials
8 Oreo cookies per groupSpoons, forks, or popsicle sticks
01
Observe the moon
Show the moon image and ask students what makes the moon shine and why its shape seems to change.
02
Gather evidence
Use the video, explainer, and infographic so students can connect their first observations to moon phase evidence before building.
03
Build the model
Students use Oreo cookies to show the shape and order of the lunar phases, including times when the whole moon is present but only part of it is lit.
04
Explain the model
Students share what each part of the model represents and explain how their model answers the investigation question.
Moon resources
Resources to support the model
Start with the video, explainer, and infographic for the cookie model. Use the additional readings when students need more background, another model option, or support explaining scale.
Use when students need help thinking about scale as they compare a classroom model to the real moon.
490L–1030L
✓Yes
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[Add Halloween-related STEM videos and simulations for quick lesson extensions](id-extensions)
STEM Lab Sequence
Moon phases cookie model
Use a Halloween-night moon hook, source evidence, and a simple cookie model to help students explain why the moon appears to change shape.
Investigation question
How can you model the phases of the moon?
Materials
8 Oreo cookies per groupSpoons, forks, or popsicle sticks
01
Observe the moon
Show the moon image and ask students what makes the moon shine and why its shape seems to change.
02
Gather evidence
Use the video, explainer, and infographic so students can connect their first observations to moon phase evidence before building.
03
Build the model
Students use Oreo cookies to show the shape and order of the lunar phases, including times when the whole moon is present but only part of it is lit.
04
Explain the model
Students share what each part of the model represents and explain how their model answers the investigation question.
Moon resources
Resources to support the model
Start with the video, explainer, and infographic for the cookie model. Use the additional readings when students need more background, another model option, or support explaining scale.
Use when students need help thinking about scale as they compare a classroom model to the real moon.
490L–1030L
✓Yes
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Not every Halloween STEM activity has to be a full hands-on lab or lesson. Short videos and simulations can help students make quick connections between the season and concepts they’re already studying, like light, sound, probability, and modeling.
Use these extension options when you need a warm-up, early finisher activity, or station rotations.
Generation Genius science videos
Generation Genius science videos help you make Halloween connections to support concepts you’re already teaching. For younger students, that might mean using pumpkins or spooky sounds to talk about senses. For older students, the same seasonal hook can connect to waves, chemical reactions, and matter.
Science videos
Generation Genius science videos for Halloween STEM lessons
Use these short videos as warm-ups, station resources, or low-prep extensions when students are studying sound, light, senses, matter, waves, chemical reactions, or materials.
Use when students examine costumes, masks, fake cobwebs, decorations, and props as synthetic materials.
14:44
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Generation Genius math videos
Halloween data gives math students something concrete to work with. With Generation Genius math videos, younger students can count, sort, classify, and graph seasonal objects such as candy, bats, and ghosts. Older students can use the same kind of classroom data to work with line plots, scaled graphs, probability, and random samples.
Math videos
Generation Genius math videos for Halloween STEM lessons
Use these videos when students need a quick math connection for Halloween survey data, candy counts, pumpkin measurements, probability questions, or seasonal data comparisons.
Compare Halloween survey results or candy data across groups or samples.
14:10
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PhET simulations
PhET simulations work well when students need to test an idea rather than just hear about it. For a Halloween STEM lesson, students can use simulations to explore why colored lights change what they see, how sound waves behave, and how probability works in a game-like model.
Interactive simulations
PhET simulations for Halloween STEM lessons
Use these simulations when students need to explore a Halloween-related science or math idea through an interactive model.
Pair with a Halloween candy or prize probability activity, though the simulation itself is not Halloween-specific.
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Newsela Learning Suite is all treats, no tricks!
Halloween science activities can do more than fill a seasonal gap in your lesson plans. They can give students a reason to observe, test ideas, explain evidence, and connect holiday symbols and traditions to the STEM concepts they’re already learning.
Use Newsela Learning Suite to plan timely lessons across subjects during October and throughout the school year. If you’re not a Newsela customer yet, sign up for free and get a 45-day trial of premium and differentiated content and activities.
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Halloween Science Activities for K–12 STEM LessonsUse these Halloween science activities to teach STEM with spooky experiments, life science lessons, math videos, simulations, and Newsela resources.Sep 28, 2026Sep 28, 2026https://cdn.prod.website-files.com/66f182e7ce15762d01b32e09/6abaa7e09a62d76c0be33173_Halloween%20STEM%20Blog%20Hero%20Image.jpghttps://cdn.prod.website-files.com/66f182e7ce15762d01b32e09/6abaa7e3c7106fbacd1ca1d4_Halloween%20STEM%20Blog%20Hero%20Image%20(1).jpgChristy Walters
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