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? Use the color-coded Air Quality Index to help you learn more about air quality. 

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

Join Cleveland Museum of Natural History Director of Astronomy Jason Davis for a tour of the May night skies.

Do you 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 of 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.

Learn more about endangered species and explore ways you can help stop the spread of extinction! 

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 with this website. 

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

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

This set of COSI Connects activities provide effective ways to demonstrate and talk about germs and how they spread. Click the green Open button to access this COSI Connects activity.

What is a habitat? Create a habitat for a stuffed animal or toy out of materials around the house! Discuss what sorts of things the animal needs in its habitat to survive. Click the green Open button to access this COSI Connects activity.

Find helpful tips for eating healthy to meet the needs of a growing body.