Brainpop Video: Waves

The video on waves in brainpop is about the two different types of waves electromagnetic and mechanical waves, which includes sound waves, light waves, and ocean waves. The difference between the two types is that mechanical waves need a medium (any kind of matter that's disturbed by energy) to move through whereas the electromagnetic waves don't, they can travel through empty space. But they also have a similarity, that both of the types send transfer energy from one place to another. Mechanical waves looks like it moves matter with them, but they don't, they go back to it's original place after its disturbance of waves, when its energy is passed on to another figure. Like I said before, electromagnetic waves travel through completely empty space, that is how we get light from the sun to earth. These two are different but are measured in many similar ways. The highest part of a wave is is called the crest, and the lowest is called the trough. An amplitude is the distance between the middle of the wave and the top of the wave, this tells us how much energy the wave is carrying, the more amplitude the greater the energy, and finally a wavelength is the distance a wave travels in one cycle. Frequency also measures waves. Frequency and Wavelength are related, the higher the frequency the shorter the wavelength. Transverse waves are most electromagnetic waves and ocean waves. But, waves like sound waves are called compressional, matter is moved about in the same way as energy, this forms a series of compressions which vibrate, which is how you hear sound.

Mechanical Waves: Ocean Waves, Seismic waves, Sound waves and Slinky waves.
Electromagnetic Waves: Light waves and Radio Waves