Volcanoes Question Preview (ID: 47155)


Volcano Quiz. TEACHERS: click here for quick copy question ID numbers.

In which location would you most likely find volcanoes?
a) along mid-ocean ridges and where a plate is subducted
b) far from the plate boundaries
c) along transform boundaries
d) where two continental plates collide

Before lava reaches the surface, the molten material is called
a) magma
b) rock
c) volcanic ash
d) liquid fire

The main factor that accounts for the difference between quiet and explosive volcanic eruptions is
a) the silica content of the magma
b) the size of the volcano's magma chamber
c) the iron content of the volcano
d) the age of the volcano

The main hazard from a quiet volcanic eruption is
a) destruction from lava flows
b) geysers
c) pyroclastic flows
d) ash clouds

What provides the force that causes magma to erupt to the surface?
a) dissolved gases trapped in the magma
b) the silica in the magma
c) gravity in the lithosphere
d) the density of the magma

Which of the following forms from magma that squeezes between horizontal rock layers and later hardens?
a) sill
b) batholith
c) dike
d) caldera

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called __________ volcanoes.
a) composite
b) shield
c) lava
d) cinder cone

When many layers of thin , runny lava build up a high, level area.
a) lava plateau
b) shield volcano
c) cinder cone volcano
d) composite volcano

The huge hole left by the collapse of a volcanic mountain is called a ________________.
a) caldera
b) lava plateau
c) cinder cone
d) shield volcano

When magma hardens in a volcano's pipe, the result will eventually be a landform called a ___________.
a) volcanic neck
b) sill
c) batholith
d) dike

What is the average speed that the Pacific Plate was moving around 35 million years ago?
a) 45 cm/year
b) 10 cm/year
c) The hot spot moved, not the plate.
d) 2 miles / year

Which statement is supported by the Hot Spot activity?
a) Hawaiian Islands that are further from the hot spot are older.
b) Hawaiian Islands that are further from the hot spot are younger.
c) Hawaiian Islands are some of the oldest land structures on the planet.
d) The Hawaiian Islands formed the same way most volcanoes form.

What is the current direction of the Pacific Plate?
a) Northwest
b) North
c) Southeast
d) south

How does an Island Arc form?
a) The converging of 2 oceanic plates.
b) The divergence of 2 oceanic plates.
c) The formation of a Hot Spot.
d) The converging of one oceanic plate and one continental plate.

This is a large mass of rock formed when magma cools inside the crust.
a) batholith
b) sill
c) dome mountain
d) volcanic neck

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