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Igneous Rocks & Minerals Classwork Questions

Total questions: 35

Worksheet time: 26mins

Name
Class
Date
1.
A type of rock that forms from the cooling of molten rock at or below the surface of the earth
a)
Igneous Rock
b)
Metamorphic Rock
c)
Sedimentary Rock
d)
chemical Rock
2.
Igneous rock that forms from lava on Earth's surface
a)
Organic Rock
b)
Intrusive Rock
c)
Clastic Rock
d)
Extrusive Rock
3.
Igneous rock that forms when magma hardens beneath Earth's surface
a)
intrusive Rock
b)
compaction
c)
Chemical Rock
d)
Clastic Rock
4.
A slow cooling igneous rock will have _____ crystals
a)
large
b)
small
c)
average
d)
black
5.

Describe the mineral composition of the following igneous rock.

a)

felsic

b)

mafic

6.

Describe the mineral composition of the following igneous rock.

a)

felsic

b)

mafic

7.
Which item listed below is not a property of a mineral?
a)
Streak 
b)
Shape 
c)
Luster
d)
Hardness
8.
What does the Moh's scale measure?
a)
Luster 
b)
Density
c)
Hardness
d)
Texture 
9.
Which mineral property is being shown here?
a)
luster
b)
hardness
c)
cleavage
d)
streak
10.
A mineral breaks into pieces like are shown in the picture. How would you describe its breakage?
a)
Fracture
b)
Cleavage
c)
Glassy
d)
Waxy
11.

a naturally occurring, non-living solid that has a specific chemical make-up and a repeating structure.

a)

rock

b)

mineral

c)

stone

d)

mountain

12.

Gold, silver and copper are examples of minerals that have ______________________ luster.

a)

metallic

b)

nonmetallic

13.

Describe the texture of the following igneous rock (grain size 1-10 mm).

a)

vesicular

b)

glassy

c)

fine

d)

coarse

14.

Describe the texture of the following igneous rock.

a)

smooth

b)

coarse

c)

vesicular

d)

glassy

15.

Magma that is low in silica usually forms light-colored rocks, such as granite.

a)

True

b)

False

16.

Which igneous rock is an extrusive rock?

a)

porphyry

b)

rhyolite

c)

pegmatite

d)

granite

17.

When all the grains in a rock are large and easy to see, the rock is described as

a)

Fine-grained

b)

Coarse-Grained

c)

Glassy

18.

Extremely rapid cooling of lava in which no crystals form, creates what type of texture?

a)

Fine-Grained

b)

Coarse-Grained

c)

Glassy

19.
Coarse or Fine?
a)
coarse
b)
fine
20.
High or Low Silica?
a)
high
b)
low
21.
Coarse or Fine
a)
coarse
b)
fine
22.
Describe this rock
a)
Intrusive , High Silica
b)
Intrusive , Low Silica
c)
Extrusive , High Silica
d)
Intrusive , Low Silica
23.
What type of rock is this?
a)
Extrusive igneous rock
b)
Intrusive igneous rock
24.
Rocks are made out of minerals.
a)
True
b)
False
25.
This rock cooled on the outside of a volcano and contained air bubbles when it was forming. What type of rock is this?
a)
Glassy
b)
Vesicular
c)
Coarse
26.
Is lava above or below ground
a)
below
b)
above
27.

Pegmatite is a coarse-grained, intrusive, igneous rock. How did it form?

a)

rapidly cooling lava

b)

slowly cooling magma

28.

Rhyolite is a fine-grained, extrusive, igneous rock. How did it form?

a)

rapidly cooling lava

b)

slowly cooling magma

29.

When this lava cools, will the rock have a high or low silica content?

a)

High

b)

Low

30.

When this lava ash cools, will it have a high or low silica content?

a)

High

b)

Low

31.

Take out a piece of scrap paper and your blue ESRT. Estimate the percentage of minerals present in the rock Diorite:

(Video is there as a helpful reminder if needed)

a)

40% plagioclase feldspar, 50% pyroxene, 10% olivine, 10% amphibole

b)

55% plagioclase feldspar, 15% biotite mica, 30% amphibole

c)

20% potassium feldspar, 40% quartz, 20% plagioclase feldspar, 10% biotite, 10% amphibole

d)

15% plagioclase feldspar, 55% biotite mica, 30% amphibole

32.

A fine-grained igneous rock contains 11% plagioclase, 72% pyroxene, 15% olivine, and 2% amphibole. This rock would most likely be classified as

a)

granite

b)

rhyolite

c)

gabbro

d)

basalt

33.

Which extrusive igneous rock is composed of approximately 40% quartz, 20% potassium feldspar, 20% plagioclase feldspar, 10% biotite mica, and 10% hornblende?

a)

rhyolite

b)

gabbro

c)

granite

d)

basalt

34.

Where is magma located?

a)

above ground

b)

below ground

c)

in the stratosphere

d)

in the thermosphere

35.

Describe the rate of cooling for the following igneous rock.

a)

slow cooling

b)

rapid cooling

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