meh
Of course and vice versa.
Yes. Yes because frequency is the same as volume or pitch as we use for a science term.
A high amplitude means the sound is loud and a high frequency/pitch means just that. For example, a very loud train whistle.
The sound would be like thunder, since thunder also has high amplitudes and frequency also. Usually at the begining of thunder you will listen cracking (krat..kat..krat .........) sound which is high...