How small is an atom? Video

This video does an excellent job explaining the answer to the question, "How small is an atom?  It compares an atom to the size of a grapefruit and a blueberry.  It is amazing to visualize just how small atoms really are.
 If you happen to be teaching about atomic structure, this might help your students understand this particular scientific concept.

How does your nose smell? Video

This is a TEDed lesson on how our noses smell and detect odor. This is a cartoonized video with a great story track.  This science video goes through the different parts of the nose and some parts of the tongue as taste and smell go hand in hand.  The video also discusses the difference between certain animals and our human noses.  One of the interesting science concepts that is discuss is why some people lack a sense of smell.

Do aliens exist? Video

When you are teaching a unit on Astronomy, inevitably you are going to get into a discussion with students on the possibility of life outside of our own solar system.  This video asks people on the street whether or not they believe in aliens.  The responses are great to listen to.  The discussion of the video is more about the knowledge of how vast a galaxy really is.  If people understood how far a light year actually is, it would be less likely that anybody would believe in the alien types that visit the Earth.

Is it possible to stop an asteroid? Video

Bill Nye the Science Guy describes how scientists and physicists might be able to stop an asteroid as it comes closer to Earth.  He discusses the possibilities and potential methods of "shifting" an asteroids course.  He discusses some math and units of conversion dealing with weight.  He explains the science and possibilities in a manner that is very easy to understand.  This video might help you as a science teacher visually introduce asteroids to your students.

Is there gravity in space? Video

In this video the question as to whether there is actually gravity in space is answered.  The video discusses that astronauts are not actually floating in space but in reality they are falling and so ismthe International Space Station.They never hit the Earth though because they are also moving forward at an incredible speed.  Gravity does affect objects in space but because of motion, objects can maintain an orbit.