Ch 3 Review

Volcanoes & Extrusives

What’s the difference between magma and lava?

What is a caldera?

Name an example of a caldera.

Describe 2 ways calderas form.

Is lava viscosity high or low if it contains a lot of silica?

Does high silicate content create a quiet or explosive volcanic

eruption?

What else affects the speed of lava flows?

Which has more SiO2 content- Mafic or felsic?

Which has more Fe, Mg, Ca content - Mafic or felsic?

Which is quieter - felsic or mafic?

The Columbia Plateau is a basalt plateau. How did it form?

Why do lahars happen close erupting volcanoes?

What are the 2 major volcano belts on Earth?

Which is steepest - Cinder Cone, Stratovolcano, or shield

volcano?

Which is widest - Cinder Cone, Stratovolcano, or shield

volcano?

Which has highest viscosity - Cinder Cone, Stratovolcano, or

shield volcano?

Which is most violent - Cinder Cone, Stratovolcano, or shield

volcano?

Which has what type of lava -Mafic, Felsic, or Mixed?

Cinder ConeStratovolcanoShield volcano

Name or location of each… - Cinder Cone-Stratovolcano

-Shield Volcano

What is AA?

What is tuff?

What is Pahoehoe?

What is tephra?

What is lapilli?

What are lahars?

What are Pyroclastic flows?

What is a Lava Dome?

What super volcano created Crater Lake?

What volcano caused many sudden deaths by pyroclastic

flow?

What nearby volcano has had renewed activity?

What volcano buried Pompeii?

What volcano was “heard ‘round the world’?

What characterizes Pumice?

What does porphyritic rock have in it?

Learn the word PHENOCRYST

What shape are volcanic bombs?

Describe Obsidian

What volcanic rock is dark with holes (similar to scoria)?