Layers of Earth
Venting Volcano Vocab
100
What is the most outer layer called?
The crust
100
Name 1 type of volcano
Cinder cone, composite (strata), shield
200
Name the 4 main layers from the inside going out
inner core , outer core, mantle , crust
200
What does plume mean?
The large cloud that forms over the volcano after it erupts
300
Name the layer that lies on top of the upper mantle and below the crust
What is its meaning
Asthenosphere
Frail or weak
300
Explain:
Magma vs lava
Magma Chamber
fissure
Magma is molten rock inside the volcano
Lava is what magma is called when it reaches the outside of the volcano
magma chamber is where magma is stored under volcano
fissure means crack
400
What two elements make up the inner core ?
Iron and nickel
400
what does it mean if a volcano is
active; dormant; or extinct ?
Active - the volcano is or will erupt
Dormant - an active volcano that is not erupting, but supposed to erupt again.
Extinct - is not expected to erupt again
500
What causes the tectonic plates to move?
The convection currents in the mantle
500
What does pyroclastic and tephra mean?
pyro - fire
clastic - fragments
tephra - the debris that erupts from a volcano