When subduction occurs, the crustis weakened by the collision, and cracks can form.
Lava can break through the cracks and form a volcano!
Parts of a volcano:
Magma Chamber: As magma flows out of the mantle, it collects in a big underground pool
Magma: The hot, molten rock that comes out of the mantle.
Pipe: Narrow, vertical crack that brings magma to the surface.
Side Vent: Weak side cracks in the volcano can allow lava to come out the sides.
Vent: The main exit for magma to leave the pipe.
Lava: Magma that reaches the surface.
Crater: The bowl shaped mouth of the volcano.
A volcano is a lot like a person!
Stomach = magma chamber
Puke = magma/lava
Esophagus = pipe
Neck/Throat = vent
Mouth = crater
Types of Volcanic Eruptions:
Quiet Eruption = magma is runny and oozes or pours out of the vents, forming a swift lava flow!
Though quiet eruptions might seemfairly harmless, the lava flows fastand burns or melts whatever it touches!
Explosive Eruption = magma is thickand sticky, clogs the pipe and buildsup pressure until it explodes!
This can form a Pyroclastic Flow (ash, cinders, and boulders blow out!)
If you don’t get hit by falling chunksof rock, the ash could still choke or bury you!