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WorksheetsRocks 6.2R
Total questions: 16
Worksheet time: 9mins
Name
Class
Date
1.
Molten rock is called two different names depending on where it is. What of the following shows the correct name with the correct place it is found.
a)
It is called magma when found below ground and lava when found above ground.
b)
It is called magma when found above ground and lava when found above ground.
c)
It is called magma when found below ground and lava when found below ground.
d)
It is called magma when found above ground and lava when found below ground.
2.
Why do different igneous rocks have different sized crystals?
a)
They are different colors.
b)
They are different shapes.
c)
They were heated differently.
d)
They cooled at different rates.
3.
This type of igneous rock is created when volcanic material erupts, cools and crystallizes on Earth's surface.
a)
Intrusive Igneous Rocks
b)
Extrusive Igneous Rocks
c)
Both of these are correct.
d)
None of these are correct.
4.
When magma underground containing dissolved gases comes to Earth's surface the pressure decreases and the gases separate. What noticeable features do these kinds of rocks have?
a)
large crystals
b)
holes
c)
smooth surfaces
d)
none of these are correct
5.
Which of the following is a common example of an intrusive igneous rock?
a)
pumice
b)
obsidian
c)
granite
d)
andesite
6.
Which of the following is a common example of and extrusive igneous rock?
a)
granite
b)
diorite
c)
sandstone
d)
basalt
7.
Why does the magma cool slowly inside our Earth's crust?
a)
it is insulated by solid rock
b)
it is insulated by water
c)
it is insulated by a blanket
d)
none of these are correct
8.
This type of igneous rock is created when magma cools slowly, forms well defined crystals randomly arranged and interlocking.
a)
Intrusive Igneous Rocks
b)
Extrusive Igneous Rocks
c)
Both of these are correct
d)
None of these are correct
9.
Which of the following are used to identify igneous rocks?
a)
arrangement and size of crystals
b)
mineral composition
c)
none of these
d)
both of these
10.
When looking at igneous rocks, texture is determined by looking at........
a)
the mineral crystals' size and arrangement in the rock
b)
the color and size of the minerals' crystals
c)
the minerals' crystals color and arrangement in the rock
d)
none of these are correct
11.
When looking at igneous rocks, geologists look at the rock's silica content to determine its......
a)
texture
b)
composition
c)
color
d)
hardness
12.
When the silica is light in color quartz and feldspar the silica is ___________ in content.
a)
low
b)
high
c)
medium
d)
equal
13.
When the silica is dark in color olivine and pyroxene the silica is ___________ in content.
a)
low
b)
high
c)
medium
d)
equal
14.
Which of the following are a list of the three main types of rocks?
a)
extrusive igneous rocks, intrusive igneous rocks, and obsidian
b)
igneous, sandstone, and sedimentary
c)
metamorphic, sandstone, and igneous
d)
igneous, sedimentary, and metamophic
15.
Intrusive igneous rocks have ______________ visible crystals.
a)
large
b)
small
c)
smooth
d)
rough
16.
Extrusive igneous rocks have ______________ and sometimes invisible crystals.
a)
large
b)
small
c)
smooth
d)
rough
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