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Chap 10
Test Description: Volcanoes
Instructions: Answer all questions to get your test result.
1) How are intrusive igneous bodies classified
A
all of the answers are correct
B
relationship to surrounding rock layer
C
shape
D
size
2) The largest intrusive igneous body is called a
A
sill
B
dike
C
bathollith
D
stock
3) Which type of intrusive features forms when magma is injected into fractures cutting across pre existing rock
A
lava plateau
B
sill
C
dike
D
laccolith
4) Magma forms when solid rock in the crust and upper mantle melts
A
vaporizes
B
crystalized
C
dools
D
melts
5) In general, an increase in the confining pressure results in what change in a rocks melting temperature
A
melting temperature is not related to confining pressure
B
melting temperature stays the same
C
melting temperature increases
D
melting temperature decreases
6) Which of the followig is responsible for the partial melting of rock beneath ocean ridges
A
chemical reactions with atmospheric oxygen
B
increase in temperature
C
decrease in pressure
D
increase in pressure
7) Magma tends to rise towards Earths surface primarily because
A
rocks become more dense when they melt
B
silica is abundant in magma
C
rocks become less dense when they melt
D
water is abundant in magma
8) Most of the active volcanoes on EArth are located in a belt known as the
A
circum Atlantic belt
B
East African Rift Valley
C
Ring of Lava
D
Ring of Fire
9) Which type of alndform develps at plate boundaries where on oceanic plated descends beneath another
A
mountain ranges formed by a bathlith
B
lava plateau
C
rift valley
D
volcanic island arc
10) Most interaplate volcanic activity occurs where
A
hot magma descends intoo the mantle under a plate
B
oceanic plates diverge
C
oceanic and continental plates converge
D
hot mantle plumes rise toward the surface within a plate
*select an answer for all questions
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