article_snippet.sent: Destructive: Volcanoes occur at the edges of tectonic plates which make up the earth's crust, either where these plates are moving toward or away from one another.
article_snippet.sent: Eruptions occur when magma  forces magma   way to the surface, exploding through weak points in the earth's crust .
article_snippet.sent: Volcanoes occur at the edges of tectonic plates which make up the earth's crust, either where these plates are moving toward or away from one another.
article_snippet.sent: Eruptions occur when magma from the earth's core forces the Earth's core way to the surface, exploding through weak points in the earth's crust.