when subduction occurs, the crust is weakened by the collision, and cracks can form. lava can break...
TRANSCRIPT
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!