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3rd - 7th Grade Engineering and Science Inquiry Activities : Page 2

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

A Single Movable Pulley and Mechanical Advantage

In this fun experiment, we&#39;ll find out how color affects heat absorption!

Which Color Absorbs the Most Heat?

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.

Heat Capacity of Water vs. Heat Capacity of Oil

This project explores whether there is an effect on people, including heart rate and self-expressed mood, when they are exposed to different types of music.

Does Music Affect Your Mood?

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Best Fertilizer: The Effects of Fertilizer on Plant Growth

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

Design Challenge: Design a Roller Coaster

This science fair project idea experiments with spinning color wheels and optical illusions.

A Trick for the Eyes: Color Wheels and Optical Illusion Tops

This experiment will evaluate if chewing gum affects students' test performance.

Does Chewing Gum Affect Test Performance? 

This science fair project idea explores whether talking to a plant will help it grow.

Talking to Plants

The possibilities are endless with this fun Halloween-themed STEM activity! With simple supplies, your child will experiment, adapt, and use their creativity while they build structures using different specifications.

Halloween STEM Building Challenge

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.

Windmill Model Science Project

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

Plant Phototropism Experiment

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Fastest Way to Cool a Soda

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Testing the Solubility of Common Liquid Solvents

This science fair project idea explores the different properties & interactions of sugar molecules.

Sugar Crystallization

Take a dive into the candy jar with this yummy science experiment.

Candy pH

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Do Plants Need Water?  

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!

How Do the Phases of the Moon Affect the Tides?

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Growing Plants in Garbage

Check out this cool science fair project on identifying rocks and minerals for kids.

Identifying Rocks and Minerals

This project examines whether people's taste perception is influenced by what they see.

Taste Perception

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Duck Feet

This experiment investigates the relationship between the temperature of a candle and its burn rate.

Does a Candle's Temperature Affect Its Burn Rate?

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Hydrogen Peroxide and Yeast

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Reaction Time: The Ruler Drop Test

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Do Plants Grow Better in Sunlight or Artificial Light?

In this fun activity, your child will create their very own solar oven to bake s&#39;mores!

Design Challenge: Making a Solar Oven

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Create Your Own Earth Model

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

How to Separate Salt from Water

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

Buoyant Force of Water

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