Volcanoes. Chapter 7. Volcano – weak spot in the crust where a mountain forms when layers of lava and volcanic ash erupt and build up and push through
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Magma - less dense than the rock around it so it is very slowly forced upward toward Earth’s surface made up of gases, water molten rock forming stuff
Lava – magma that reaches the earths surfaceVolcanoes and Plate Tectonics
Crater – opening at the top of a volcano’s vent