4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

This science fair project idea compares biodiversity between drops of water.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

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!

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

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

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

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.