Does Am signals travel as changes in the radio waves?

Yes, AM (Amplitude Modulation) signals travel as changes in the amplitude of the radio waves. In AM broadcasting, the audio signal modulates the strength of the carrier wave, creating variations in amplitude that correspond to the sound being transmitted. This allows the receiver to decode the changes in amplitude back into the original audio signal. Thus, the information is carried by the fluctuations in the wave's strength rather than its frequency.