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Fifth Grade Science Fair Project Ideas

Education.com's 5th grade science projects enable kids to apply everything they've learned over the course of their elementary school careers in order to discover some pretty cool and new things about the world around them. In addition to setting up more sophisticated experimental procedures, 5th graders can analyze their results using more sophisticated math, and may begin to acquire an appreciation for large sample sizes and their ability to produce more reliable averages. Browse our rich collection of 5th grade science fair projects by clicking the boxes to the left to filter your results by scientific subtopic to find fantastic 5th grade science fair projects or enlightening 5th grade science experiments for your young scientist.

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Fifth Grade

How to Measure Viscosity of Liquids

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

What Causes the Phases of the Moon?

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

How to Make Gears

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

How to Make a Rubber Band Car

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Catalase and Hydrogen Peroxide Experiment

In this cool catalase and hydrogen peroxide experiment, kids put a potato in a jar of hydrogen peroxide to see how catalase acts as an enzyme.

3D Model of the Sun

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

How Do the Phases of the Moon Affect the Tides?

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Grass Turning Yellow: Chlorosis

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Examples of Mechanical Weathering

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

The Hydrologic Cycle

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Plant Phototropism Experiment

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Effect of Artificial Light on Plant Growth

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

Microwave Plant Experiment: Radish Seed Germination

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

Parts of a Bean Seed

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

Total Alkalinity and pH of Personal Care Products

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.

Balloon Rocket Experiment

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Tensile Strength Test

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Heat Capacity of Water vs. Heat Capacity of Oil

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Does Ultraviolet (UV) Light Pass through Some Colors More than Others?

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Plane Mirror Reflection Experiment

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Windmill Model Science Project

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Does Electricity Move Better through Thick Wires or Thin Ones?

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Salinity and Hatching Brine Shrimp Eggs

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Sink or Swim: Calculating Density of Fruits and Vegetables

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

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