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Igneous Rocks and Igneous Processes

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

According to the Bowen's reaction series, which mineral forms at the hottest temperature?

a)

Olivine

b)

Pyroxene

c)

Potassium (K) feldspar

d)

Quartz

2.

According to the Bowen's Reaction Series, which mineral forms at the coolest temperature?

a)

Olivine

b)

Pyroxene

c)

Potassium (K) feldspar

d)

Quartz

3.

What minerals should you find in gabbro and basalt (check all that apply)

a)

pyroxene

b)

amphibole

c)

muscovite mica

d)

quartz

e)

plagioclase feldspar

4.
_____ is an igneous rock made up of the minerals quartz, mica, feldspar, and hornblende.
a)
granite
b)
basalt
c)
pumice
d)
gneiss
5.

This picture shows you high temperature minerals forming and sinking to the bottom of the magma chamber this changes the composition of the magma chamber. What is the name for this process

a)

partial melting

b)

crystal settling

c)

assimilation

6.

This picture shows you some of the rock melting, this new magma is very different than the original rock this process is called

a)

crystal settling

b)

assimilation

c)

partial melting

7.

If two magmas mix the composition of the new magma may be different

a)

True

b)

False

8.
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
9.
Igneous rock that forms from lava on Earth's surface
a)
Organic Rock
b)
Intrusive Rock
c)
Extrusive Rock
10.
Igneous rock that forms when magma hardens beneath Earth's surface
a)
Intrusive Rock
b)
Compaction
c)
Extrusive Rock
11.

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

a)

rapidly cooling lava

b)

slowly cooling magma

12.

Basalt is an extrusive igneous rock. What does this tell you about it?

a)

it was formed from lava that erupted onto Earth's surface

b)

it was formed from slowly cooling magma

c)

it was formed from magma that hardened beneath Earth's surface

13.

Describe the texture of the following igneous rock.

a)

smooth

b)

coarse

c)

vesicular

d)

glassy

14.

Describe the texture of the following igneous rock. Gas bubble texture

a)

glassy

b)

rough

c)

vesicular

d)

coarse

15.

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

a)

vesicular

b)

glassy

c)

fine

d)

coarse

16.

Describe the texture of the following igneous rock (grain size < 1mm). The minerals do not reflect light well.

a)

glassy

b)

fine

c)

coarse

d)

vesicular

17.

Describe the mineral composition of the following igneous rock. Light in color with high silica

a)

felsic

b)

mafic

18.

Describe the environment of formation for the following igneous rock (grain size < 1 mm).

a)

above ground

b)

below ground

19.

A metal that can be mined for a profit is a(n)?

a)

ore

b)

gem

c)

sedimentary rock

d)

Mr. K is pretty metal

20.

Diamond is a valuable mineral found in rare, ultramafic rocks known as ______.

a)

gravel

b)

pegmatites

c)

kimberlites

d)

quarts