Multiple choice

An explosion of hot ash, cinders, and gases during an explosive volcanic eruption.  

  1. compression

  2. aftershock

  3. pyroclastic flow

  4. tsunami

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A pyroclastic flow is a fast-moving current of hot gas and volcanic matter that moves away from a volcano. It is one of the most dangerous volcanic phenomena.