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.
Amateur radio, âham radio,â is one way to build friendships and networks now, before catastrophe peaks. While preppers lean towards individualism, no single man, no single family can acquire all the necessary skills to thrive or even survive long term. No single man, no single family can rebuild a decent society.