As frequency increases, wavelength decreases.

The higher the amplitude, the louder a sound is.  

If a wave interferes with another wave, the result is always a bigger wave than the original waves.  

As amplitude increases, wavelength decreases.  

wavelength

amplitude

frequency

crest

1

2

3

4

A

B

D

E

The top one because the amplitude is a fraction.

The bottom one because the amplitude is higher.

They both have the same amount of energy because they have the same wavelength.

They both have the same amount of energy because they have the same frequency.

back and forth 90 degrees from the direction of the wave (perpendicular)

along the wave the same speed as the wave travels

back and forth in the same direction as the wave (parallel)

Transverse

Longitudinal

liquids

solids

gasses

infinite data values

easier to transport

processing is easy

better security

because there are two straws, one of them is taped to the top of the cup, the other is in the water

because the light is bending, or refracting, as it goes into the water from the air, causing us to see it differently

because the light is reflecting, or bouncing off of the water, causing another straw to appear

because the straw is broken 

refraction

diffusion

reflection

steel, air, sea water, glass

air, sea water, glass, steel

air, glass, sea water, steel

sea water, glass, air, steel