Volcanoes - AQAStructure and common features of volcanoes
Composite and shield volcanoes are found along plate margins. They have distinctive characteristics and can have both positive and negative effects on people and the landscape.
magma chamberA region under the surface of the Earth where hot molten magma collects. - this is where the molten rock is stored beneath the ground
main ventThe thin narrow pipe in the middle of a volcano that connects the magma chamber to the crater. - this is the channel through which magmaMolten rock that is found within the Earth. travels to reach the Earth's surface
secondary ventThe thin narrow pipe at the side of a volcano formed when the main vent is blocked. - some magma may escape through the side of the volcano, particularly if the main vent becomes blocked
craterThe hole at the top of a volcano where lava and ash escape. - this is found at the top of the volcano, where the magma erupts from