An active volcano is one that has erupted in recorded history or is currently erupting. An aerosol consists of tiny particles of liquids or solids suspended in the air. An atmospheric shock wave is compressed air that is formed by a volcanic eruption. An atom is the smallest part of an element that has the properties of that element. Avalanches can be composed of rock, snow, soil, or ice.
Volcanic eruptions can cause avalanches.
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