Glaciers advanced from Canada and retreated four or more times. Over a few million years, Puget Sound was carved and scoured by glaciers. Heavy Pressure. Glaciers containing up to 2,383 cubic miles of ice pushed over the Puget lowland.
AM stands for amplitude modulation, while FM stands for frequency modulation. In AM, the amplitude (the height or depth of the crests or troughs) changes, while in FM, the fre â¦ quency changes. Answered.
It is only for FM stations (Most people donât realize this). The AM antenna on a portable radio i s a coil INSIDE the radio. To get the maximum signal, rotate the entire radio 360 degrees and you will notice a huge improvement in the sound with the radio facing a given direction.he AM antenna on a portable radio i s a coil INSIDE the radio. To get the maximum signal, rotate the entire radio 360 degrees and you will notice a huge improvement in the sound with the radio facing a given direction.