Investigating Light

The sun, lightbulbs, and flickering fires all bring light to our world. But have you ever watched light rays moving? Or seen how light rays reflect off objects? Now you can!...

Sinking the Sultana A Civil War Story of Imprisonment, Greed, and a Doomed Journey Home

The worst maritime disaster in American history wasn't the Titanic. It was the steamboat Sultana on the Mississippi River—and it was completely preventable.In 1865, the...

Investigating Magnetism

You know that magnets hold pictures on a refrigerator. But have you ever found a magnet's north pole? Or turned an ordinary paper clip into a magnet? Now you can! Explore...

Investigating Sound

People, animals, machines, and wind all make sounds. But have you ever seen how sound waves move? Or made a sound wave bounce? Now you can! Explore sound with the fun experiments...

Investigating Heat

The sun, furnaces, and ovens all make heat. But have you ever watched matter expand when it is heated? Or seen how different kinds of matter conduct heat? Now you can! Explore...

Put Wheels and Axles to the Test

What do bicycles, doorknobs, and screwdrivers have in common? All of them use wheels and axles to perform work! Wheels and axles are simple machines. They help us to do jobs more...

Put Pulleys to the Test

What do flagpoles and some window blinds have in common? They use pulleys to perform work! Pulleys are simple machines. They help us to do jobs more easily. But don't take our...

Put Screws to the Test

What do jar tops and water-bottle lids have in common? Both of them are screws! Screws are simple machines. They help us to do jobs more easily. But don't take our word for it....

Researching Rocks

Rocks can be made of many different minerals. By looking at rocks closely, we can tell where they were formed and what conditions they were created in. How do we know these...

Marveling at Minerals

Minerals are fascinating resources that have a variety of uses. A diamond is a mineral that is sought after for its beauty. Salt is a useful mineral that adds flavor. But do you...

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