Volcanoes Guided Notes Part I

Volcanoes Guided Notes


Part 1

Multiple Choice

An opening in the earth’s crust through which magma erupts.

• Earthquake

• Volcano

• Sinkhole

Magma

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As magma forms, it flows ​

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through cracks in the rock above it.

Drag and Drop

Viscosity – the ability of a liquid to ​

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flowing

Corn Syrup: ​

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viscosity

Baby Oil: ​

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viscosity

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resist

High

Low

increase

reduce

Kinds of Eruptions

Rift Eruptions

Subduction Boundary Eruptions

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Occur at ​

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boundaries

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Occurs in ​

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zones

Most of the world’s active volcanoes occur at subduction boundaries

Ex. Japan, Philippines, Cascades, Andes

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Lava, steam and ash are ejected violently

Like earthquakes, volcanoes tend to occur at plate boundaries!

The exceptions are...

Hot Spots

The cause of hot spots is unclear!

Examples:

Hawaiian Islands
Yellowstone National Park
Mount St. Helens