Amplitude:
On the subject of sound, amplitude is basically what we know of as volume. When more energy is transported through a sound wave, the amplitude increases. If you are looking at a visual of a sound wave, the more amplitude the sound wave has, the taller the individual waves are, both in compression and rarefaction.
Frequency:
Frequency is what we more commonly know of as pitch. In sound, it's how high or low a note is. Frequency is measured in Hertz, which is basically the measurement of how many waves there are per second. Humans can hear all frequencies from 20Hz to 20,000Hz, but anything below that is Ultrasonic and anything above is Infrasonic which we cannot hear. On a visual of sound waves frequency is measured by how frequent the waves are. Frequency has no impact on the amount of energy being transported through a sound but lower frequency sounds do increase the wavelength.