Physical Science

In Class Sound

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This video from Season Two, Episode Three of the "Indiana Expeditions" TV series shows the science of creating and making changes to sound to a class of students.

What Color is the Moon? | It's Okay to Be Smart

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How the night sky tricks our brains!

Atoms: The Space Between

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You wouldn't know it to look at it, but the atoms that make up a solid piece of iron contain more space than stuff. How is it then that the whole world doesn't just crumble around us? This video segment adapted from A Science Odyssey uses models, vivid descriptions, and analogies to explain the structural integrity of matter at the atomic level.

This video is available in both English and Spanish audio, along with corresponding closed captions.

Cheese by the Numbers: 1 | Cheese Cubed

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What was the no. 1 good imported to the U.S. in 2007? Why is salt in cheese? Answers to these questions are in this episode of Cheese Cubed!

Does the Moon Really Orbit the Earth? | It's Okay to Be Smart

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According to Newton's law of gravitation, the sun should "pull" way harder on the moon than the Earth does. So does the moon actually orbit the Earth? Why?

Using Nanoscience to Understand the Properties of Matter

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Atoms and molecules are the basic units of matter. The properties of matter that you can see and touch are dictated by the kinds of atoms and bonds that make it up. But if atoms are too small to see, how can scientists figure out their properties? The video shows some special tools that allow scientists to take pictures of and make changes to very tiny or nanoscale materials.

Island of Stability

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Follow scientists in their quest to understand how stable elements are made and how to create the elusive element 114 in this video segment adapted from NOVA scienceNOW. Scientists have encountered tremendous challenges working with heavy elements—those whose atomic weights exceed anything nature has created—because of the atomic forces at work, which include electromagnetic forces and the strong nuclear force. This video explores the concept of an "island of stability"—a stable new element that scientists predict should be possible to create amidst highly unstable and fleeting ones.

Kinetic Theory | Crash Course Physics

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How the heck do we map out a planet without oceans? There's some tricky, yet fascinating science behind all of it! In this episode of Crash Course Physics, Shini talks to us about sea level, kinetic theory, and phase changes.

How Comets Become Active | To Catch a Comet: Chapter 4

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Understand the importance of gaining key information about the target comet before Rosetta enters orbit around it. After we learn that the comet has become active earlier than expected, Dr. Claudia Alexander demonstrates in a laboratory how and why a comet develops its coma. We follow the flight team as they perform the first Big Burn which propels Rosetta into the comet's path.

The Science of Rainbows | It's Okay to Be Smart

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Our culture, and our skies, are full of rainbows, but do you know how they form? Do we all see the same rainbow? Join Joe Hanson, host of It's Okay to Be Smart, as he finds that the answer to all of these questions involves a little physics and the number 42.

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