Physical Science

Veritasium demonstrates a PyroBoard.  A PyroBoard is a flame that is bounced around by sound waves.  Through the experiment you can actually see and hear how the sound waves change.
 

Veritasium does a good job following the scientific method in order to find out what a candle flame is actually made out of.  Your students will get to see some experiments that will show the answer to the question.
 

Have you ever wondered what sound actually looks like?  In this NPR video, your students will actually get to see real sound waves as air is distorted.
 

This video also teaches kids what Schlieren Images are and how focussing light allows to see the unseen.

Have you ever wondered whether or not ketchup was considered a liquid or a solid.  After all it can take a lot to get ketchup out of a bottle.  Sometimes you have to shake and squeeze really hard and then it all come squirting out.  Well in this TEDEd video they will explore the science behind ketchup and other similar substances' viscosity.
 

This is an awesome video demonstrating quantities of food that equal 200 calories.  The video goes through the science behind a calorie and show many of the foods we like and how much you can eat before hitting 200 calories.
 

Here is a fun poem created to show all of the elements on the periodic table.  Much of the poem demonstrates where the different names came from and why they got their names.
 

This video is awesome.  It discusses why it would be impossible for Godzilla to exist.  It talks about all of the largest animals to ever exists and how Godzilla would die upon exiting the ocean.  The square cube law is also discussed.

This video answers the question, "Why is our solar system flat?"  

Have you ever wanted to know how rainbows are formed?  This video quickly and graphically demonstrates and explains how they are formed.

Optical illusions are some of the most fun things you can browse for on the internet.  In this video, ASAP Science discusses a little bit about optical illusions.