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71 Science Fair Projects for 6th Graders

71 Science Fair Projects for 6th Graders

Our collection of 6th grade science projects offer a fun and hands-on way for middle school students to explore a variety of fascinating science concepts.

Is a dog's mouth cleaner than a human's?
Do humans or dogs have more bacteria in their mouth? This fun science project will help you discover the answer by exploring the bacteria in both a dog's mouth and ...
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Burn Rate of a Candle
Does the temperature of a room affect how quickly a candle burns? Find out in this science project!
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Fast Food Nutrition
Are you curious about what's really in your fast food? Find out by conducting this experiment!
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Soap and Surface Tension
Learn how soap can break the surface tension of water and mix oil and water together!
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Does Music Help Plants Grow?
Can plants grow better when they listen to classical music? Find out in this experiment!
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Baking with Yeast
Learn how yeast helps make bread rise and become fluffy!
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Plant Growth: Hydroponics vs. Soil
Can plants grow faster when grown hydroponically instead of in soil? Find out in this experiment!
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Singing Glass
Make music with water and a glass! Learn how to turn a drinking glass into an instrument.
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Moisturizer Test
Let's find out which body lotion will keep the most moisture from evaporating!
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The Chocolate Rock Cycle
Have you ever heard of rocks made of chocolate? Use chocolate to learn about the rock cycle in this delicious science project!
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Comparing Blood Pressure
Are you curious to know if your blood pressure is higher when you're resting or when you're exercising? Find out in this experiment!
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Cleaning Teeth: A Science Project
What's the best way to clean teeth? Find out in this science project!
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Soda and Teeth: A Science Experiment
Ever wondered which soda is the worst for your teeth? Find out in this fun science experiment!
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My Pet Rock in the Rock Cycle
Curious about pet rocks? Make some and learn about the rock cycle in the process!
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Rock Hardness Challenge
How hard is that rock? You can learn how to classify your own rocks by their hardness just like geologists!
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Can Exercise Improve Test Scores?
Does physical activity before an exam help you do better?
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How Temperature Affects Taste
Do you like your food hot or cold? Find out how temperature affects your taste buds in this fun experiment!
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Soap Bubbles in Carbon Dioxide
Have you ever wondered how long soap bubbles can stay afloat in carbon dioxide? Let's find out!
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Building Strong Bridges
Learn how to build bridges that can hold a lot of weight using triangles and squares!
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Investigating Water Loss in Plants
Let's explore how much water plants lose through transpiration and see if bigger leaves mean more water loss!
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Germ Hotspots
Are you curious to find out where the most germs are hiding? Join us in this science project to find out!
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Temperature and Magnets
Let's explore how temperature affects the strength of magnets!
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Temperature and Viscosity
Learn how temperature affects the viscosity of water, milk, and corn oil!
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The Greenhouse Effect
Let's explore how different surfaces affect the temperature increase due to the greenhouse effect!
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Preserving Bread with Fruit
Have you ever wondered how to make bread last longer? In this science project, you will find out how adding fruit paste to bread can help preserve it!
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Betta Fish Aggression
Can a betta fish learn to ignore a mirror? Find out in this science project!
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Music and Naptime: A Study
Does classical music help kids rest better during naptime? Find out in this experiment!
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Exploring the Tilt of the Earth
Learn why the seasons change and how the tilt of the Earth affects the intensity of the sunlight at a given location!
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Solar Oven Hot Dog Cooker
Make a hot dog cooker that uses the power of the sun! You can use this solar oven to cook other things too!
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Measuring Heartbeats
Learn how to make your own stethoscope and measure your own heartbeat!
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Does Salt or Sugar Affect Plant Growth?
Let's find out if salt or sugar can help or hurt plants when added to water!
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Diffusion and Osmosis in Animal Cells
Discover how different solutions affect an animal cell and observe if substances pass through the cell membrane!
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Growing Mold
Have you ever wanted to grow your own mold? Now you can!
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Improving Memory
Can you remember what you saw on a flash card? What helps you remember?
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The Effect of Detergents on Plants
Can detergents really kill plants? Find out in this experiment!
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Which Bridge Design is Stronger?
Let's find out which type of bridge is the strongest out of three types of bridges!
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Exploring Potential Energy
Learn how height and weight can affect potential energy with this fun science project!
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Viewing Sunspots
See the sun like never before! View sunspots through a telescope or a homemade 'pinhole camera' and explore the sun's surface.
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The Doppler Effect
Have you ever noticed that sound changes when you move? Find out why with this fun science project!
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Vegetable Propagation
Learn how to grow your own vegetables with this fun science project! You'll explore different methods of vegetative (asexual) propagation and see which one works best.
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Investigating Food Deserts
Do food deserts exist in your community? Find out by visiting grocery stores and surveying residents in both urban and non-urban areas.
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Video Games and Blood Pressure
Does playing video games make your blood pressure go up? Find out in this fun experiment!
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Stress and Memory
Can stress affect how well you remember things? Find out in this experiment!
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Color and Taste
Do you think the color of a beverage affects how it tastes?
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Explosive Elephant Toothpaste
Get ready to create a massive, bubbling tube of toothpaste using only hydrogen peroxide, yeast and dish soap!
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Geode Rock Borax Crystal
Make your own sparkling geode rock crystals at home with Borax and see science in action!
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Electricity from a Lemon
Discover the incredible power of lemons! With lemons and basic materials, you can create an eco-friendly battery that powers an LED light!
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Egg with Vinegar
Explore this fascinating egg experiment with vinegar that makes a bouncy egg! Discover the science of acid and base chemical reactions and protein denaturation!
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Rock Candy: Sweet Science
Get ready to become a candy-making scientist! Grow your own giant sugar crystals and make rock candy you can eat!
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Fruit Solar System
Explore the solar system with fruits! Pick which fruit represents each planet based on their size, then order them according to their distances from the sun.
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How to Make Oobleck: Is it a Liquid or Solid?
This simple Oobleck recipe of cornstarch and water is a fun introduction to the complex science of non-Newtonian fluids!
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Sparkling Rainbow Crystal
Make your own sparkling rainbow crystals at home with Borax and see science in action!
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Magic Milk Experiment
See colors magically move in milk with soap! This fun experiment demonstrates surface tension in a vivid way!
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Solar System Model with Foil, Play dough and a Balloon
Build a mini version of our solar system with planets made from play dough or foil and a balloon sun. Discover the wonders of space!
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Pocket Solar System: A Scaled Model of Our Solar System
Ever wanted to hold the solar system in your hands? With this project, you can build your own pocket-sized model!
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Water Strider Challenge: Make a Bug Walk on Water!
Can you make a pipe cleaner foil bug walk on water? Find out with this engineering challenge by building your own water strider and exploring the science of surface tension.
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Play-doh Solar System Scale Model
Explore our solar system with Play-doh! Make a scale model of planets and moons and learn about their size and distance from each other.
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How Many Earths Fit Across the Sun?
Have you ever wondered how big the Sun really is? See how many Earths can go across the Sun!
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Tooth Decay Experiment With Eggs
Can your favorite drinks harm your teeth? Find out using hard boiled eggs in this science project!
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Freezing Rocks: Mechanical Weathering with Water
Ever wondered how water can break rocks? Discover the power of ice in this exciting experiment on weathering!
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Cornstarch Quicksand: Can You Escape Its Grasp?
Mix cornstarch and water to make quicksand and see if your hands sink!
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Fizzy Rocks: Vinegar on Rocks
Find out if rocks have calcium carbonate, also known as calcite, in them with a simple fizz test!
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Porosity and Permeability of Rocks: Holding Water, Gas and Oil
Can some rocks hold more oil, gas and water than others? Find out in this rock porosity and permeability experiment!
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Measuring Rock Density
Rocks are irregularly shaped. How can you measure the density of a rock? (Density = weight / volume) Discover the answer by using water displacement and weighing the rock to ...
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Starburst Rock Cycle
Make delicious rock formations using Starbursts! Learn how the earth makes rocks in a tasty way.
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Crayon Rock Cycle
Discover how to make your own sedimentary, metamorphic, and igneous rocks using crayons!
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Solar System Scale Model on the Sidewalk
Create your own solar system model to scale on the sidewalk and take a walk through space!
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Egg Drop Project: Protect the Egg!
Can you protect a raw egg from breaking when dropped from high up? Have fun in this engineering challenge!
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One Minute Spaghetti
Science makes it possible to cook spaghetti in just a minute! Soak it first, then cook in a flash. Save the planet while enjoying your favorite dish!
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Magical Color-Changing Lava Lamp
Watch as changing colors swirl and dance in this mesmerizing lava lamp experiment using red cabbage juice and Alka-Seltzer tablets. Discover the secrets of pH indicators and fizzy reactions!
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Paper Airplane Challenge
Let's see which paper airplane can fly the farthest! Fold, decorate, and launch your own planes to find the winning design.
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6th Grade Science Fair Project FAQ


What are some easy 6th grade science fair projects?

Each one of these science fair projects are easy for sixth grade students to set up and do!

  • Burn Rate of a Candle

  • Soap and Surface Tension

  • Baking with Yeast

  • Color and Taste

  • Growing Mold

  • Cleaning Teeth: A Science Project

  • Comparing Blood Pressure

  • The Chocolate Rock Cycle

  • Uncovering Fall Colors

  • Making Oobleck: Liquid or Solid?

Science fair project details right above the FAQ!


What is the best 6th grade science project ever?

We love the Color and Taste science fair project for sixth grade students. The same flavored drink is made red, orange and purple with food coloring. When the three drinks are given to people, see what people taste! It's fascinating to see how color affects our perception of taste in this classic science experiment!

If you're looking for more 6th grade science projects, check out the 6th grade science fair projects at the top of this page! 

Check out more Best Science Fair Projects


What are some cool 6th grade science fair projects?

Get ready to be amazed by these super cool science projects for 6th graders! With just a few simple things, sixth graders will see how fun and cool science is!

  • Does Music Help Plants Grow?

  • Dogs vs. Humans: Bacteria in the Mouth

  • Singing Glass

  • Burn Rate of a Candle

  • Fast Food Nutrition

  • Soap and Surface Tension

  • Baking with Yeast

  • Cleaning teeth: A Science Project

  • Video Games and Blood Pressure

  • Moisturizer Test

Science fair project details right above the FAQ!


What are 5 testable questions for 6th grade?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects what happens. This is how we can discover the answer to our question!

  • What makes a cloud form?

  • Can drink and food taste different just by changing its color?

  • Does the color of light affect photosynthesis?

  • Does temperature affect seed sprouting?

  • What makes popcorn pop?

Here are more testable questions along with their science projects


What are the top 10 science projects for 6th grade?

These are our top 10 science projects for 6th grade, with projects covering biology, chemistry, physics, medicine and health. These projects can be used as science fair project ideas or as a fun experiment to explore different areas of science!

  • Dogs vs. Humans: Bacteria in the Mouth

  • Burn Rate of a Candle

  • Fast Food Nutrition

  • Soap and Surface Tension

  • Does Music Help Plants Grow?

  • Baking with Yeast

  • Plant Growth: Hydroponics vs. Soil

  • Singing Glass

  • Moisturizer Test

  • The Chocolate Rock Cycle

Science project details above the FAQ!


Can I do a 6th grade science fair project in a day?

Yes! Quick experiments can be a great option for a science fair project! If you want to explore quick reactions, we have science project ideas on various topics to get you started.

  • Acids and bases: Test different fluids to see if they are an acid or a base!

Learn how to make your own acid/base indicator using red cabbage and use it to test different fluids! Make Your Own PH Indicator

  • Chromatography reactions: Separate out colors!

Have you ever wondered why leaves change color in the fall? Let's find out by using chromatography to separate the colors of a green leaf! Uncovering Fall Colors

  • Heat reactions: Heat speeds things up!

Ever wondered if a balloon filled with water can withstand fire? Fire-Resistant Balloons


What are some hands-on ways to find inspiration for my science fair project?

Science museums are great places to explore if you're looking for inspiration for your next science fair project or just want to learn more about science. Science museums, natural history museums, space museums, and discovery museums are all great places to do that! You can discover all sorts of interesting things about science and find cool project ideas for science fairs.

There may be free admission days or free passes to a science museum near you! Check your local library for free museum passes, nearby science museums for free entrance days and your credit card for offers.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!


How do I start a science fair project?

Science fair projects are a fun and unique way to discover science by asking a question and doing a science project. We'll help you find a science fair project idea and guide you through the process of doing and presenting your science fair project with Science Fair Coach's Science Fair Project Guide.


What should I do after I have a science fair project idea?

If you have a science fair project idea, Science Fair Coach can help you turn it into a full science fair project! Starting at Introduction to Science Fairs, we'll guide you through how to do a science fair project, from designing and conducting your experiment to collecting and analyzing your findings. Then, we'll help you showcase your results on a science fair board with our Guide to Science Fair Posters.


How do I make a science fair board?

Your science fair board is where you show off your science fair project for everyone to see and learn from. With our Guide to Science Fair Posters, you can make sure your science fair board stands out and impresses at the science fair!


What is the scientific method?

The 7 steps of the scientific method helps us understand how nature works. Learn how the scientific method is used in a science fair project example, and how it's evolved through history as scientists used different ways to learn about nature with our Guide to the Scientific Method!


What is the engineering design process?

The 6 steps of the engineering design process helps us design an effective solution to a problem. Learn how to use the engineering design process with the example of the egg drop challenge in our Guide to the Engineering Design Process!


Where can I find a science fair competition?

Science fair competitions are an excellent opportunity to explore science. One of the of the premier science advocacy organizations, the Society for Science, is associated with more than 400 science fair competitions in almost every US state, as well as over 70 other countries, regions, and territories. You can find out if there's a Society of Science affiliated science fair near you!

The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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