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Heat: How Animals Adapt to Extreme Temperatures

Related Article: Learn more about physics.

Elephants use their skin and ears to survive high temperatures. Emperor penguins keep warm through their feathers, feet and the insulation of other penguins.
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Physics: Overview of the Motor Effect

Physics: Overview of the Motor Effect (1:02)

This video investigates the principles involved in the forces on a current-carrying conductor in a magnetic field. Additionally, this video compares DC motors to meters and shows how to build a simple DC electric motor.

2057: Time Travel

2057: Time Travel (2:44)

Time travel is a topic that has fascinated people for years. Learn more about the idea of time travel in this video from HowStuffWorks.

Physics: Electromagnetic Forces

Physics: Electromagnetic Forces (29:00)

This video introduces and investigates the concept of electromagnetism. Students then apply principles learned in the lab to workings of a malfunctioning speaker.

Physics: Primal Forces

Physics: Primal Forces (2:53)

Learn about the primal forces of the universe-gravity, electromagnetic, the Strong and Weak nuclear force.

Physics: Charge on the Electron

Physics: Charge on the Electron (29:00)

In this video, students repeat the procedure used by R.A. Millikan in his oil-drop experiment. They measure, collect and analyze the data to determine the charge on one electron.

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10 Ways to See into the Future: Time Travel

10 Ways to See into the Future: Time Travel (2:46)

Can time travel allow us to visit the future? Watch as a child explains Einstein's theory on the elasticity of time on The Science Channel's "10 Ways to See into the Future."

What the Ancients Knew: Buoyancy Defined

What the Ancients Knew: Buoyancy Defined (1:06)

Ever wonder why some objects float and others sink in water? Watch and find out as host Jack Turner explains the phenomenon of buoyancy on The Science Channel's series, "What the Ancients Knew."

100 Greatest Discoveries: Study of Relativity

100 Greatest Discoveries: Study of Relativity (2:14)

Einstein's study of relativity led to the now famous equation e=mc squared. Learn more about this equation on The Science Channel's "100 Greatest Discoveries."

100 Greatest Discoveries: Laws of Motion

100 Greatest Discoveries: Laws of Motion (1:17)

Sir Isaac Newton developed the laws of motion which explain the movement of all physical objects. Learn more about motion on The Science Channel's "100 Greatest Discoveries."

Exploring Time: Attoseconds

Exploring Time: Attoseconds (2:59)

On the Science Channel's "Exploring Time," learn about attoseconds and see an electron in motion.

100 Greatest Discoveries: General Relativity

100 Greatest Discoveries: General Relativity (4:09)

On the Science Channel's "100 Greatest Discoveries," learn about Albert Einstein's theory of general relativity.

Matter and Energy: The Particle Accelerator

Matter and Energy: The Particle Accelerator (2:34)

Particle accelerators slam protons traveling at about 99% of the speed of light into a beam of particles traveling in the opposite direction.

Matter and Energy: Atoms in Molecules

Matter and Energy: Atoms in Molecules (0:30)

A molecule is a combination of two or more atoms. A water molecule contains two hydrogen atoms and one oxygen atom, as shown by its formula, H2O.

Matter and Energy: Atoms in Elements

Matter and Energy: Atoms in Elements (1:14)

Elements are pure substances made up of only one kind of atom. An atom is the smallest amount of an element.

Matter and Energy: The Structure and Scale of an Atom

Matter and Energy: The Structure and Scale of an Atom (2:46)

We now know that atoms are made up of a nucleus that contains protons and neutrons and that electrons exist in an electron cloud surrounding the nucleus. Electrons have a negative charge, protons have a positive charge and neutrons have no charge.