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67 Second Grade Science Experiments

67 Second Grade Science Experiments

We believe in the importance of early exposure to science. A hands-on activity or science experiment is the best way to introduce kids to science! We've handpicked a variety of second grade science experiments that will teach kids science and ignite their curiosity to the world around them.

Changing the Color of Flowers
Did you know you can change the color of flowers? With this science experiment, you can!
Easy
Watering Plants: Does it Make a Difference?
Do you want to know if watering plants makes them grow faster? Join us in this experiment to find out!
Easy
Powering Up with Potatoes
Learn how to make a battery from potatoes and measure the voltage and current it produces!
Easy
Rocket Film Canisters
Make a rocket fly sky high with just baking soda and vinegar!
Easy
Sprout Success: Soil Temperature Experiment
Can the temperature of the soil affect how fast a seed will sprout? Let's find out!
Easy
Does Milk Help Plants Grow?
Does milk help plants grow better than water? Find out in this fun science project!
Easy
The Greenhouse Effect in a Jar
Learn about the greenhouse effect with this simple experiment! See for yourself how the air in a jar gets warmer and warmer when exposed to sunlight.
Easy
Popping Popcorn
What makes popcorn pop? Find out how to make the perfect popcorn!
Easy
Make Your Own Fossil
Have you ever wanted to make something that lived millions of years ago? Now you can! Learn how to make your own fossil with this fun science project.
Easy
How Much Water is in an Orange?
Let's find out how much water is in an orange! We'll use a kitchen knife, paper plate, aluminum foil, and a weighing scale to figure it out.
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Balancing a Ball in Air
Suspend a ball in a stream of air and feel the force of the air pushing it back in!
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Mixing Colors of Light
Have you ever wondered what happens when you mix colors of light? In this project, you will use flashlights and colored plastic sheets to find out!
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Make a Pinhole Viewer
Make a simple pinhole viewer to see the images carried by light shining through a pinhole!
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Does Wind Cool?
Does a fan really cool you off? Find out in this experiment!
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Exploring Air
Let's explore air and find out what it's like and where it's found!
Easy
Making Metal Float
Have you ever wondered why a steel ship can float, but a steel nail sinks? Let's find out how metal can float!
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Sink or Float?
Can you figure out why some cans of soda sink and others float? Join us in this experiment to find out!
Easy
Baking Soda Volcano
Create a fizzing, bubbling reaction with baking soda and vinegar! Learn about acid-base reactions and have fun while doing it!
Easy
Cleaning Up a Vegetable Oil Spill
Learn how to make a tanker and clean up a vegetable oil "spill" with this fun science project!
Easy
Swimming Raisins
Have you ever seen raisins swim? Find out how to make raisins swim with this fun science experiment!
Easy
Collecting Micrometeorites
Have you ever seen a shooting star? What if you could collect the tiny rocks that make them?
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Keeping Warm: A Comparison of Clothing Materials
Let's find out which clothing material is the best at keeping us warm!
Easy
Testing the Strength of Water Surface Tension
Can water hold up a weight? Find out by testing the surface tension of water with salt and temperature!
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The Invincible Soap Bubble!
Can you make a bubble that won't burst? Find out with this fun science project!
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Plant Growth and Water
Let's find out how much water plants need to grow healthy and strong!
Easy
Cloud in a Bottle
With just a few simple steps, creating a cloud in a jar can help us understand the process of cloud formation!
Easy
Sea Shells with Vinegar
Did you know that something interesting happens when you place a sea shell into vinegar? Explore chemical reactions involving acids and bases in this fun experiment!
Easy
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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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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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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Baking Soda Invisible Ink
Write secret messages using baking soda invisible ink and reveal them with grape juice in this cool science project!
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Lemon Juice Invisible Ink
Want to uncover secret messages like a super spy? Learn how to write and reveal messages using lemon juice and a hair dryer!
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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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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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Jumping Rice Krispies
Make Rice Krispies jump with static electricity!
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Taste With Your Nose
Can you guess the flavor of a candy without using your sense of smell? Find out in this fun science experiment!
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Camouflage and Hide
Learn how animals hide from predators and make your own moths invisible!
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Make Your Own Sundial
Learn how to tell time the old-fashioned way with your own sundial!
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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!
Easy
Sparkling Rainbow Crystal
Make your own sparkling rainbow crystals at home with Borax and see science in action!
Easy
Rocks and Minerals: Candy Geology
Have you ever wondered what the difference between a rock and a mineral is? Find out with this sweet experiment!
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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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Super Hero Egg Shells
Learn how arches are used to support heavy things with this fun experiment using egg shells!
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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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Storing Bread Safely
Learn how to keep bread from spoiling by storing it in different environments!
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Can You Taste With a Plugged Nose?
Can you tell the difference between an apple and a pear if you can't smell? Find out in this fun experiment!
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Bouncing Soccer Balls
Let's find out which type of turf makes a soccer ball bounce the most!
Easy
Can I Make Less Trash?
Can you tell which object is better for our environment? Test your recycling sense with this fun experiment!
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Test Your Reflexes!
See how fast you can react to different situations! Compare your reflexes to your friends and family and see who is the fastest!
Easy
Rolling on Inclined Planes
Let's find out how different surfaces affect how far and fast a matchbox car rolls down an inclined plane!
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Balloon-Powered Rocket Car
Build a rocket car that rolls across the floor using air from a balloon!
Easy
Make a Parachute
Learn how to make a parachute and experiment with gravity!
Easy
Oreo Moon Phases
Discover the tasty way to learn about the Moon phases using Oreo cookies! Create your very own edible Moon models to learn the different Moon phases.
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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!
Easy
Walking Rainbow Experiment
Watch the colors of the rainbow magically walk from cup to cup in this science project!
Easy
Galaxy in a Bottle
Create a mini Milky Way galaxy in a jar that sparkles! It's mesmerizing and so much fun to make and gaze at!
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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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Salt Volcano Lava Lamp
Create a lava lamp with an erupting volcano effect when you add salt to oil and water! It's so much fun to watch this colorful explosion caused by density!
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Frozen Lava Lamp Fun
Create your own frozen lava lamp with colorful ice cubes and watch as mesmerizing colored water globules dance in clear oil.
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Glow-in-the-Dark Lava Lamp
Create a mesmerizing glow-in-the-dark lava lamp that looks like a swirling snowstorm of colors!
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Alka-Seltzer Lava Lamp
Watch blobs of color float and dance in a homemade lava lamp made with Alka-Seltzer tablets, oil and water!
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Glitter Lava Lamp Magic
Create your own mesmerizing lava lamp with glitter and antacid tablets! Watch as colorful bubbles dance and sparkle, revealing the fascinating science behind this magical experiment.
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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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Baking Soda Lava Lamp
Create your own mesmerizing lava lamp with fizzy bubbles! Watch as colors swirl and bubbles rise in this exciting experiment.
Easy
Sprouting Seeds Into Plants!
Explore the magic of plant growth and watch seeds from your kitchen come to life! Sprout seeds on a paper towel, then plant them to see them thrive!
Easy
Sun Prints: Science Meets Art!
Want to make cool designs using leaves and flowers with sunlight? Explore how the Sun's UV rays affect construction paper while creating beautiful art.
Easy

2nd Grade Science Project FAQ


What are some easy 2nd grade science fair projects?

Each of these second grade science experiments are easy to do with household items. They make a lasting impression on kids, from the classic baking soda volcano to making Oobleck from the Dr. Seuss' book. An easy second grade science experiment is a great way to teach kids about chemical reactions and nature!

  • Changing the Color of Flowers

  • Rocket Film Canisters

  • Popping Popcorn

  • Make Your Own Fossil

  • Magic Milk Painting

  • Sparkling Rainbow Crystal

  • Making Oobleck: Liquid or Solid?

  • Baking Soda Volcano

  • Explosive Elephant Toothpaste

  • Growing Mold

Science fair project details right above the FAQ!


What is the best 2nd grade science project ever?

We love the Changing the Color of Flowers science fair project for 2nd graders! It's a fun project for 2nd graders to explore transpiration, the way water moves from a plant's stem to its flowers and leaves. Plus, you'll get to make any colored flower you choose!

If you're looking for more 2nd grade science experiments, check out the 2nd grade science fair projects at the top of this page! 

Check out more Best Science Fair Projects


What are some cool 2nd grade science fair projects?

Get ready to be amazed by these super cool science projects for 2nd graders! With just a few simple things, you can be fascinated by science and have tons of fun with these cool 2nd grade science projects!

  • Sparkling Rainbow Crystal

  • Rocket Film Canisters

  • Making Oobleck: Liquid or Solid?

  • Popping Popcorn

  • Make Your Own Fossil

  • Magic Milk Painting

  • Changing the Color of Flowers

  • Baking Soda Volcano

  • Explosive Elephant Toothpaste

  • Growing Mold

Science fair project details right above the FAQ!


What are 5 testable questions for 2nd 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 2nd grade?

These are our top 10 science projects for 2nd grade, with projects from Biology, Chemistry and Earth Science. These projects can be used as science fair project ideas or as a fun experiment to explore different areas of science!

  • Changing the Color of Flowers

  • Watering Plants: Does it Make a Difference?

  • Powering Up with Potatoes

  • Rocket Film Canisters

  • Sprout Success: Soil Temperature Experiment

  • Does Milk Help Plants Grow?

  • The Greenhouse Effect in a Jar

  • Popping Popcorn

  • Make Your Own Fossil

  • How Much Water is in an Orange?

Science project details right above the FAQ!


Can I do a 2nd 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.

  • Acid-base reactions: Mixing acids with bases quickly makes carbon dioxide gas!

Make a rocket fly sky high with just baking soda and vinegar! Rocket Film Canisters

  • Chromatography reactions: Separate out colors!

Did you know that some Skittles have a secret rainbow hiding inside them? Colors of Skittles Experiment

  • Heat reactions: Heat speeds things up!

Do you want to find out which color candle burns the fastest? Which Candle Burns the Fastest?


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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