Volcanoes Flashcards
What is a volcano
A volcano is a vent or chimney that connects molten rock (magma) to the earths surface
How do volcanoes form
When magma is forced up through the earths crust
What type of margins do volcanoes form at
Constructive and destructive
What are the 2 main types of volcanoes
Shield volcano
Stratovolcano
How are shield volcanos formed
When lava flows easily
What is a shield volcano
A volcano with gently sloping sides
What is a stratovolcano
A stratovolcano is a tall, conical volcano with steep sides composed of many layers of hardened lava. The lava that flows from them is thick and hardens before getting far
How do volcanic eruptions occur
When pressure builds up in the magma chamber and is released suddenly
Why will volcanic eruptions be violent
If the magma is thick and gassy.
What are the big ash clouds called
Pyroclastic flow
What are the benefits of volcanoes
Fertile soil
Volcanic rocks
Tourism
Geothermal energy
How can you predict volcanoes
Measuring the temperature of the ground
Measuring the concentration of the gases
Seismology picked up on seismometers
Ground deformation
