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3rd Grade Science Projects Resources

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The Limewater Carbon Dioxide Test
The Limewater Carbon Dioxide Test
Activity
The Limewater Carbon Dioxide Test large image
The Limewater Carbon Dioxide Test
Third Grade
Life Science
Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.
Activity
The Limewater Carbon Dioxide Test
The Limewater Carbon Dioxide Test
Activity
The Limewater Carbon Dioxide Test
Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.
Third Grade
Life Science
Activity
Conductor or Insulator
Conductor or Insulator
Activity
Conductor or Insulator large image
Conductor or Insulator
Third Grade
Engineering and Science Inquiry
This science fair project idea determines what household items are good conductors of electricity.
Activity
Conductor or Insulator
Conductor or Insulator
Activity
Conductor or Insulator
This science fair project idea determines what household items are good conductors of electricity.
Third Grade
Engineering and Science Inquiry
Activity
Bouncing Ball Physics: What is Elasticity?
Bouncing Ball Physics: What is Elasticity?
Activity
Bouncing Ball Physics: What is Elasticity? large image
Bouncing Ball Physics: What is Elasticity?
Third Grade
Engineering and Science Inquiry
What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.
Activity
Bouncing Ball Physics: What is Elasticity?
Bouncing Ball Physics: What is Elasticity?
Activity
Bouncing Ball Physics: What is Elasticity?
What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.
Third Grade
Engineering and Science Inquiry
Activity
Which Food Will Mold the Fastest?
Which Food Will Mold the Fastest?
Activity
Which Food Will Mold the Fastest? large image
Which Food Will Mold the Fastest?
First Grade
Engineering and Science Inquiry
This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.
Activity
Which Food Will Mold the Fastest?
Which Food Will Mold the Fastest?
Activity
Which Food Will Mold the Fastest?
This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.
First Grade
Engineering and Science Inquiry
Activity
Snow to Liquid Ratio
Snow to Liquid Ratio
Activity
Snow to Liquid Ratio large image
Snow to Liquid Ratio
Second Grade
Engineering and Science Inquiry
Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.
Activity
Snow to Liquid Ratio
Snow to Liquid Ratio
Activity
Snow to Liquid Ratio
Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.
Second Grade
Engineering and Science Inquiry
Activity
Which Gum has the Longest Lasting Flavor?
Activity
Which Gum has the Longest Lasting Flavor?
Third Grade
Engineering and Science Inquiry
Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!
Activity
Which Gum has the Longest Lasting Flavor?
Activity
Which Gum has the Longest Lasting Flavor?
Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!
Third Grade
Engineering and Science Inquiry
Activity
Rate of Evaporation
Rate of Evaporation
Activity
Rate of Evaporation large image
Rate of Evaporation
Second Grade
Engineering and Science Inquiry
The goal of this evaporation experiment is to learn about how different external conditions affect drying time.
Activity
Rate of Evaporation
Rate of Evaporation
Activity
Rate of Evaporation
The goal of this evaporation experiment is to learn about how different external conditions affect drying time.
Second Grade
Engineering and Science Inquiry
Activity
Does Hot Water Freeze Faster Than Cold Water?
Does Hot Water Freeze Faster Than Cold Water?
Activity
Does Hot Water Freeze Faster Than Cold Water? large image
Does Hot Water Freeze Faster Than Cold Water?
Third Grade
Measurement
Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!
Activity
Does Hot Water Freeze Faster Than Cold Water?
Does Hot Water Freeze Faster Than Cold Water?
Activity
Does Hot Water Freeze Faster Than Cold Water?
Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!
Third Grade
Measurement
Activity
Too Cold To Snow?
Too Cold To Snow?
Activity
Too Cold To Snow? large image
Too Cold To Snow?
Third Grade
Engineering and Science Inquiry
Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.
Activity
Too Cold To Snow?
Too Cold To Snow?
Activity
Too Cold To Snow?
Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.
Third Grade
Engineering and Science Inquiry
Activity
Does Hot Water Boil Faster Than Cold?
Does Hot Water Boil Faster Than Cold?
Activity
Does Hot Water Boil Faster Than Cold? large image
Does Hot Water Boil Faster Than Cold?
Second Grade
Engineering and Science Inquiry
Discover whether cold or hot water from the faucet will boil faster on the stove.
Activity
Does Hot Water Boil Faster Than Cold?
Does Hot Water Boil Faster Than Cold?
Activity
Does Hot Water Boil Faster Than Cold?
Discover whether cold or hot water from the faucet will boil faster on the stove.
Second Grade
Engineering and Science Inquiry
Activity
Color and Heat Absorption
Color and Heat Absorption
Activity
Color and Heat Absorption large image
Color and Heat Absorption
Third Grade
Engineering and Science Inquiry
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Activity
Color and Heat Absorption
Color and Heat Absorption
Activity
Color and Heat Absorption
The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.
Third Grade
Engineering and Science Inquiry
Activity
Under What Conditions Do Potatoes Sprout The Fastest
Under What Conditions Do Potatoes Sprout The Fastest
Activity
Under What Conditions Do Potatoes Sprout The Fastest large image
Under What Conditions Do Potatoes Sprout The Fastest
Third Grade
Engineering and Science Inquiry
Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!
Activity
Under What Conditions Do Potatoes Sprout The Fastest
Under What Conditions Do Potatoes Sprout The Fastest
Activity
Under What Conditions Do Potatoes Sprout The Fastest
Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!
Third Grade
Engineering and Science Inquiry
Activity
How to Stop Soda From Exploding
How to Stop Soda From Exploding
Activity
How to Stop Soda From Exploding large image
How to Stop Soda From Exploding
Third Grade
Engineering and Science Inquiry
This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.
Activity
How to Stop Soda From Exploding
How to Stop Soda From Exploding
Activity
How to Stop Soda From Exploding
This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.
Third Grade
Engineering and Science Inquiry
Activity
Get Cracking
Get Cracking
Activity
Get Cracking large image
Get Cracking
Second Grade
Engineering and Science Inquiry
Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.
Activity
Get Cracking
Get Cracking
Activity
Get Cracking
Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.
Second Grade
Engineering and Science Inquiry
Activity
A Thunderous Sound
A Thunderous Sound
Activity
A Thunderous Sound large image
A Thunderous Sound
Second Grade
Physical Science
Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?
Activity
A Thunderous Sound
A Thunderous Sound
Activity
A Thunderous Sound
Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?
Second Grade
Physical Science
Activity
Dew Point, Humidity and Weather
Dew Point, Humidity and Weather
Activity
Dew Point, Humidity and Weather large image
Dew Point, Humidity and Weather
Second Grade
Engineering and Science Inquiry
Science fair project that examines condensation and the conditions needed in order for dew to form.
Activity
Dew Point, Humidity and Weather
Dew Point, Humidity and Weather
Activity
Dew Point, Humidity and Weather
Science fair project that examines condensation and the conditions needed in order for dew to form.
Second Grade
Engineering and Science Inquiry
Activity
Third-Class Levers in the Human Body
Activity
Third-Class Levers in the Human Body
Third Grade
Engineering and Science Inquiry
Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!
Activity
Third-Class Levers in the Human Body
Activity
Third-Class Levers in the Human Body
Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!
Third Grade
Engineering and Science Inquiry
Activity
Best Insulators
Best Insulators
Activity
Best Insulators large image
Best Insulators
Third Grade
Engineering and Science Inquiry
This science fair project idea examines which type of insulation holds in the most heat.
Activity
Best Insulators
Best Insulators
Activity
Best Insulators
This science fair project idea examines which type of insulation holds in the most heat.
Third Grade
Engineering and Science Inquiry
Activity
Keeping Cut Flowers Fresh
Keeping Cut Flowers Fresh
Activity
Keeping Cut Flowers Fresh large image
Keeping Cut Flowers Fresh
Second Grade
Engineering and Science Inquiry
This science experiment tests whether warm or cold water works best in making cut flowers last longer.
Activity
Keeping Cut Flowers Fresh
Keeping Cut Flowers Fresh
Activity
Keeping Cut Flowers Fresh
This science experiment tests whether warm or cold water works best in making cut flowers last longer.
Second Grade
Engineering and Science Inquiry
Activity
How to Separate Salt from Water
How to Separate Salt from Water
Activity
How to Separate Salt from Water large image
How to Separate Salt from Water
Third Grade
Physical Science
In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.
Activity
How to Separate Salt from Water
How to Separate Salt from Water
Activity
How to Separate Salt from Water
In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.
Third Grade
Physical Science
Activity
Taste Perception
Taste Perception
Activity
Taste Perception large image
Taste Perception
First Grade
Engineering and Science Inquiry
This project examines whether people's taste perception is influenced by what they see.
Activity
Taste Perception
Taste Perception
Activity
Taste Perception
This project examines whether people's taste perception is influenced by what they see.
First Grade
Engineering and Science Inquiry
Activity
Does Gelatin Slow Down the Melting of Freezer Pops?
Does Gelatin Slow Down the Melting of Freezer Pops?
Activity
Does Gelatin Slow Down the Melting of Freezer Pops? large image
Does Gelatin Slow Down the Melting of Freezer Pops?
Third Grade
Engineering and Science Inquiry
This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.
Activity
Does Gelatin Slow Down the Melting of Freezer Pops?
Does Gelatin Slow Down the Melting of Freezer Pops?
Activity
Does Gelatin Slow Down the Melting of Freezer Pops?
This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.
Third Grade
Engineering and Science Inquiry
Activity
The Role of Fat in Food
The Role of Fat in Food
Activity
The Role of Fat in Food large image
The Role of Fat in Food
First Grade
Engineering and Science Inquiry
This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.
Activity
The Role of Fat in Food
The Role of Fat in Food
Activity
The Role of Fat in Food
This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.
First Grade
Engineering and Science Inquiry
Activity
Where Should You Store Your Popcorn?
Where Should You Store Your Popcorn?
Activity
Where Should You Store Your Popcorn? large image
Where Should You Store Your Popcorn?
Third Grade
Engineering and Science Inquiry
This project investigates the affect of storage temperature on microwave popcorn.
Activity
Where Should You Store Your Popcorn?
Where Should You Store Your Popcorn?
Activity
Where Should You Store Your Popcorn?
This project investigates the affect of storage temperature on microwave popcorn.
Third Grade
Engineering and Science Inquiry
Activity
What Lives in the Air Conditioner?
What Lives in the Air Conditioner?
Activity
What Lives in the Air Conditioner? large image
What Lives in the Air Conditioner?
Third Grade
Life Science
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
Activity
What Lives in the Air Conditioner?
What Lives in the Air Conditioner?
Activity
What Lives in the Air Conditioner?
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
Third Grade
Life Science
Activity
Does Adding Salt to Pasta make it Cook Faster?
Does Adding Salt to Pasta make it Cook Faster?
Activity
Does Adding Salt to Pasta make it Cook Faster? large image
Does Adding Salt to Pasta make it Cook Faster?
Third Grade
Engineering and Science Inquiry
Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.
Activity
Does Adding Salt to Pasta make it Cook Faster?
Does Adding Salt to Pasta make it Cook Faster?
Activity
Does Adding Salt to Pasta make it Cook Faster?
Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.
Third Grade
Engineering and Science Inquiry
Activity
Does Water Temperature Cause Metal to Expand and Contract?
Does Water Temperature Cause Metal to Expand and Contract?
Activity
Does Water Temperature Cause Metal to Expand and Contract? large image
Does Water Temperature Cause Metal to Expand and Contract?
Third Grade
Engineering and Science Inquiry
Discover whether a metal will expand under hot water.
Activity
Does Water Temperature Cause Metal to Expand and Contract?
Does Water Temperature Cause Metal to Expand and Contract?
Activity
Does Water Temperature Cause Metal to Expand and Contract?
Discover whether a metal will expand under hot water.
Third Grade
Engineering and Science Inquiry
Activity
Defying Gravity
Defying Gravity
Activity
Defying Gravity large image
Defying Gravity
Second Grade
Engineering and Science Inquiry
This science fair project idea investigates how magnetism can defy the force of gravity.
Activity
Defying Gravity
Defying Gravity
Activity
Defying Gravity
This science fair project idea investigates how magnetism can defy the force of gravity.
Second Grade
Engineering and Science Inquiry
Activity
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Activity
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors? large image
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Second Grade
Engineering and Science Inquiry
Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!
Activity
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Activity
Does Storing Cucumbers and Tomatoes in the Fridge Spoil Its Unique Flavors?
Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!
Second Grade
Engineering and Science Inquiry
Activity
Albedo
Albedo
Activity
Albedo large image
Albedo
Third Grade
Vocabulary
Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?
Activity
Albedo
Albedo
Activity
Albedo
Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?
Third Grade
Vocabulary
Activity
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About 3rd Grade Science Projects Resources

On Education.com, parents and teachers can explore a variety of 3rd grade science projects. These hands-on activities and experiment guides help young learners explore biology, physics, chemistry, and earth science using everyday household items. Examples include experiments with plant water transport, magnetism, volcano modeling, water and oil density, and observing weather patterns. Each project connects to core concepts in science, making learning engaging and accessible.

Education.com provides multiple formats for exploring 3rd grade science through worksheets, printable experiment guides, interactive games, and lesson plans. These resources allow students to learn foundational scientific principles while practicing observation, experimentation, and critical thinking skills. Structured projects make science approachable and encourage curiosity at every step.

Using ready-to-go materials from Education.com helps parents and teachers save time and ensures educationally sound experimentation. Materials motivate young students to learn while providing clear instructions that support independent exploration. Kids develop curiosity, essential scientific skills, and confidence through engaging projects and structured instructional resources.