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Transcript of Waves
Today we're going to learn about the way energy can get from one place to another. One way is invisible and can travel millions of miles through nothing. Another way needs somthing to travel through.
There are two ways:
Mechanical waves are waves that require a medium. This means that they have to have some sort of matter to travel through. (Matter is anything that takes up space.)These waves travel when molecules in the medium collide with each other passing on energy.
Examples: Sound Waves, Ocean Waves, Seismic Waves (earthquakes)
Electromagnetic waves are waves that can travel through a vacuum (empty space). They don't need a medium or matter. They travel through electrical and magnetic fields that are generated by charged particles.
Examples: Visible Light, Infrared Light (remote control units), X-rays, Radio Waves
Which wave can you see?
Can you see mechanical waves or electromagnetic waves?
Lets take a look at mechanical waves!
Lets watch about electromagnetic waves!
What are we doing today?
We can only see these:
Complete your Venn Diagram in your science packet! (Page 7)
Now lets build our cannons!
You will need:
What kind of energy does it use and what type of wave is it demonstrating?
It starts as potential energy and changes to kinetic energy once it is released. The wave it is demonstrating is a mechanical wave.
Now time to fill out what you learned in your science packet! (Page 8)