Molecules in Liquid
As molecules in a solid get hotter, they vibrate faster and faster and eventually slip out of their lattice-work pattern. When this occurs, the substance melts, changing from a solid to a liquid state. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level. 
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Compare the north and south polar regions
Part 1: Compare the north and south polar regions. James Weygand – IGPP/UCLA discusses North and South Pole conjugate space physics data to see if similar signals are received/emanated. Compares and contrasts the North and South pole: vegetation, lakes, wind, dark/light. Run time 02:57.
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Landing - a Summary
This NASA video segment explores how Newton's laws apply to the landing of an airplane. Viewers watch an instructor at NASA's National Test Pilot School explain that each step of an airplane's landing can be described with physics. Viewers also learn that a test pilot's job is to find the optimal methods for landing an aircraft.
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Generating Electricity
The High School Physics Project: Generating electric energy.  Lenses Law makes it difficult to actually generate electricity.
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Work
A circus strongman and a clown help present the physics definition of work. Concept: Work = force x distance. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level. 
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Heat as Energy
Heat is produced whenever there is movement and friction between two objects. Since movement is a form of energy, it follows that heat must also be a form of energy. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level.
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Radiation Waves
Viewers learn that one of the chief ways in which heat energy moves is in the form of waves. This kind of heat transfer is called radiation.  Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level.
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Radiation Spectrum
Viewers learn that the waves of heat energy radiated by the sun come in many forms, which together make a band, or spectrum, of energy waves. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level.
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The Triple Chute
Professor Ephraim Fischbach demonstrates energy conservation using three different slides and three identical balls - called the triple chute  - in this video from Thinkwell's online Physics series. Run time 02:23.
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The Giant Nose-Basher
Professor Ephraim Fischbach demonstrates the giant nose-basher in this video from Thinkwell's online Physics series. Professor demonstrates and explains energy conservation with a bowling ball. Run time 05:49.
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Introduction to Motion
Introduction to basic physics of motion. Introduces the concept of variable velocity/acceleration. This video, which is suitable for high school students, starts with a black screen because the instructor uses it as a 'chalkboard.'
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Introduction to Motion (Part 2)
More on how velocity, distance, acceleration, and time relate to each other. Introduction to basic physics of motion. This video, which is suitable for high school students, starts with a black screen because the instructor uses it as a 'chalkboard.'
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Inertia
This program introduces the series and sets forth the concept of inertia, the first law of physics: Things like to keep on doing what they're already doing. Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in a simple and well-illustrated way.  Good for students of any elementary school level.  The 'meat' of the video starts at 01:28.
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Acceleration Part I
With the examples of a bicycle and a baseball player, an important rule of physics becomes apparent. Concept: Force = mass x acceleration.  Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level.
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Acceleration Part II
An animated locomotive helps explain how acceleration works and is calculated. The importance of reasonable units is stressed. Concept: Acceleration = m/s2.   Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level. 
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Eureka! Episode 11 - The Inclined Plane
This program demonstrates how an inclined plane allows you to trade increased distance for decreased force.  Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level.
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What Every Dog Should Know About Quantum Physics
This is a teacher-created slideshow (33 slides) that is an overview of Quantum Physics.
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Physics in Action: Musical Instruments and Waveforms
Professor Ephraim Fischbach demonstrates musical instruments and waveforms in this video from Thinkwell's online Physics in Action series. The video uses lecture format and demonstrations to aid in the explanation of waves.  Run time 04:53.
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Molecules in Solids
This program defines the three states of matter, and illustrates the lattice-work pattern of molecules in solids. Viewers learn the origin of the word "molecule." Eureka was a series of short cartoons on physics that ran on public television in the 1980's.  The video explains the concept in simple and well illustrated way.  Good for students of any elementary school level. 
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Sound
Student-produced video for a physics class that shows how sound comes from a variety of sources with different characteristics. It explains properties of sounds, and how these properties change depending on the environment. Video explains how the human ear perceives sound, and what makes something noise. Grades 9-12. 9:13 min.
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