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.
The is an alarm clock with an AM/FM radio receiver. It features a snooze button, lighted digital time display, built-in speaker, and sleep timer. The radio has analog tuning and covers kHz AM, as well as MHz FM.