Want to save the planet? Start by saving water!

The Earth is alive! Learn how the Earth's biosphere—its organisms, soil, water, and atmosphere—all work together.

How do you know when it's safe to play outside?

Have you seen a bald eagle in Ohio? What about an osprey? Learn what animals are being brought back and about invasive species that have changed Ohio's environment in this seven-minute video from Ohio's Department of Wildlife.

What's the difference between an asteroid, a meteor, and a comet? NASA fills you in.

Wish someone could explain the difference between a balanced and unbalanced force? Then watch this four-minute video by two middle school science teachers—with help from their students.

How did cell theory develop? Learn about microscopes and the development of cell theory.

 Learn about the parts of the cell, cellular division, and basic cell function!

Do you ever wonder about the different clouds in the sky and what they can tell you? Then watch this five-minute video by the National Weather Service.

What are the stages in coal formation? Find out here!

How do living things interact with their environment? Learn more in this 14-minute video that focuses on the ecosystem in Yellowstone National Park.

How do you diagnose a sick stream? Find out in this eight-minute video from the Smithsonian.

It takes a lot of energy to support life on Earth. Where does it all come from?

Active energy vs. stored energy. What's the difference? Find out here.

Water and soil, water and leaves, water and plants...which filters water best? Test all three in this short video.

Learn more about Earth's topography and how 3D land forms are represented on flat topographical maps with this collection of videos and interactive maps.

There are four horizons (layers) of soil: O, A, B, and C. Learn about them all here.

 Learn about the parts of the cell, cellular division, and basic cell function!

Celebrate light with the IYL2015. Videos, articles, science projects, and more!