Volcano Pre-Test

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Volcano Pre-Test

Please take a few minutes to answer the following questions as accurately as you can. This pre-test will not affect your grade, in addition to allowing you to discover what you do and do not know about Earthquakes, this information will be used to design the upcoming unit. Relax and answer to the best of your ability, pay attention to when you "know" the information and when you are "guessing."

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1. In which location would you most likely find volcanoes?

A. along transform boundaries

B. where two continental plates collide

C. along mid-ocean ridges and where the plate is sub ducted

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2. The main factor that accounts for the difference between quiet and explosive volcanic eruptions is

A. the size of the volcano's magma chamber.

B. the age of the volcano.

C. the silica content of the magma.

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3. What provides the force that causes magma to erupt to the surface?

a. the silica in the magma

b. dissolved gases trapped in the magma

c. the density of the magma

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4. If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?

a. It is probably about to erupt.

b. it is dormant.

c. it is extinct.

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5. Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called

a. shield volcanoes.

b. cinder cone volcanoes.

c. composite volcanoes

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6. When many layers of thin, runny lava build up a high, level area, the result is a

a. lava plateau.

b. shield volcano.

c. cinder cone volcano.

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7. The huge hole left by the collapse of a volcanic mountain is called a

a. lava plateau

b. caldera

c. sill

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8. A major volcanic belt known as the _______ circles the Pacific Ocean.

a. island arc

b. batholith

c. ring of fire

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9. True or False: Volcanoes that form along a mid-ocean ridge occur at a diverging plate boundary.

True

False

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