A Glacier Mariela.Ruiz
Glacier A large mass of ice formed from snow high ground and moving very slowly down a mountain or along a sloping valley or spreading slowly over a large are of land until it melts or breaks. Northern Italy The Apls
Volcano An opening or openings in the earths, crust at the top of and sometimes on the sides of a cone- shaped hill or mountain, connected to the interior of the earth by a funnel or crater through which steam gases, ashes, rocks, and lava are forced out in periods of activity. Island Sicily Mount Etna
They both are mountains.
Contrast A volcano has lava. A glacier is formed from ice.