General Knowledge Quiz for Tuesday, 14 October 2014

A new general knowledge quiz is available every day. Try today's quiz or work through our archive of daily and themed quizzes.

Question 1: What term is used for a volcanic rock that is a solidified frothy lava typically created when super-heated, highly pressurised rock is violently ejected from a volcano, formed when lava and water are mixed, due to the simultaneous actions of rapid cooling and rapid depressurisation?