When subduction occurs, the crust is weakened by the collision, and cracks can form. Lava can break through the cracks and form a volcano!

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Presentation transcript:

When subduction occurs, the crust is 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 seem fairly harmless, the lava flows fast and burns or melts whatever it touches!

Explosive Eruption = magma is thick and sticky, clogs the pipe and builds up pressure until it explodes!

This can form a Pyroclastic Flow (ash, cinders, and boulders blow out!)

If you don’t get hit by falling chunks of rock, the ash could still choke or bury you!