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Igneous Rock Review
Test Description: S6E5c:Group igneous rock by process of formation
Instructions: Answer all questions to get your test result.
1) The defintion of an igneous rock is?
A
Rock fragments and iron
B
Rock that contains iron
C
Rock that forms from magma or lava
D
Rock that forms from other rock
2) What does ALL igneous rock begin as?
A
Crystals
B
Magma
C
Lava
D
Clastic
3) An Igneous rock that cools outside of the Earth's crust is called a ________________ rock.
A
Extrusive
B
Intrusive
C
Fine
D
Coarse
4) What kind of texture does igneous rock have when magma cools slowly?
A
Coarse-grained
B
Medium grain
C
Mafic Fine Grained
D
Fine-grained
5) What is meant when referring to the texture of an igneous rock?
A
element
B
the size, shape and arrangement of mineral grains, the look
C
mass of the rock
D
the color of the rock
6) For igneous rocks, crystal size is interpreted to imply which of the following?
A
chemistry/composition of the magma
B
how the magma felt during cooling
C
temperature of the magma
D
time allowed for cooling of the magma/lava
7) Which one of the following factors is most important in determining the texture of an igneous rock?
A
the type of dissolved gases in the magma
B
the rate at which the magma or lava cools
C
the composition of the magma
D
the type of rock surrounding the magma
8) Which of the following word combinations is correct?
A
intrusive; quartz
B
extrusive; igneous
C
extrusive; volcanic (lava)
D
volcanic; granite
9) An igneous rock that formed by rapid cooling will probably have crystals that are
A
a coarse texture with large crystals
B
a coarse texture with small crystals.
C
a fine texture with small crystals.
D
a fine texture with large crystals
10) When referring to rocks composition means?
A
book
B
grain size
C
position
D
makeup, composed of, made from, minerals
*select an answer for all questions
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