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!

This experiment will explore the possibility of a connection between lunar cycles and how humans are affected.

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

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.

Free science fair project idea examining how different types of water affect plant germination and growth.

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

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

This science fair project idea produces consumable fresh water from salt water through desalination.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

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!

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

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

This fun middle school science fair project idea helps student discover the concepts behind deep sea diving and how Cartesian divers work.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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.

How is NASA able to launch something into orbit around the Earth? Learn about the relationship between gravity, speed, and orbit in space in this cool project!

Have fun with bubbles and find out why there are bubbles in your tap water in this cool science fair project idea.

Kids build a rainforest food web to explore trophic levels in this cool science fair project for 4th grade.

The projects describes the correlation between Gravel Run and Centreville Landing in terms of pH, dissolved oxygen, turbidity, and temperature.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.