How are water molecules different in ice compared to vapor

as ice, the water molecules are tightly packed together in a rigid arrangement, they vibrate but do not move. as vapor, the water molecules are zooming around at a high speed in no regular arrangement.

the index of refraction of the second medium is higher. i just took the test trust me !

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.