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Igneous Rocks Review

Total questions: 27

Worksheet time: 17mins

Name
Class
Date
1.

Rhyolite...

a)

Has a similar mineral composition to Gabbro

b)

Cooled slowly

c)

Contains High amounts of Pyroxene

d)

Is fine-grained

2.

One mineral found in Diabase but not in Granite is

a)

Quartz

b)

Amphibole

c)

Biotite

d)

Olivine

3.

The two processes that form igneous rocks are

a)

Melting and Solidification

b)

Deposition and Burial

c)

Compaction and Cementation

d)

Heat and Pressure

4.

Select Two minerals found in Diorite

a)

Potassium Feldspar

b)

Plagioclase Feldspar

c)

Biotite Mica

d)

Olivine

5.

Which of the following indicates that an igneous rock cooled slowly?

a)

Glassy texture

b)

Coarse-Grained intergrown crystals

c)

Fine-Grained intergrown crystals

d)

Large amounts of aluminum

6.

Compared to Rhyolite, Pegmatite

a)

Has more Biotite Mica

b)

Is more dense

c)

Contains more magnesium

d)

Cooled more slowly

7.

A rock that cooled on the surface

a)

Is called plutonic

b)

Is coarse-grained

c)

has a fast rate of cooling

d)

contains quartz

8.

One example of a rock with gas pockets is

a)

Granite

b)

Scoria

c)

Gabbro

d)

Dunite

9.

Mafic rocks

a)

are more iron-rich

b)

Are more likely to have quartz

c)

include granite and rhyolite

d)

are less dense

10.

Basalt

a)

is coarse-grained

b)

cooled slowly

c)

likely formed beneath the surface of Earth

d)

is fine-grained

11.

Why does granite appear pink?

a)

Due to its rate of cooling

b)

granite forms extrusively

c)

granite contains quartz and potassium feldspar

d)

granite is extremely dense

12.

compared to gabbro, granite

a)

cooled more slowly

b)

has the same minerals

c)

is darker in color

d)

contains more silicon and aluminum

13.

rocks that cool slowly

a)

are extrusive

b)

are intrusive

c)

have fine-grained texture

d)

are found near the top of the reference table on page 6

14.

Rocks to the left side of the reference table chart are

a)

more dense

b)

mafic

c)

rich in olivine

d)

felsic

15.

One example of a mafic rock is

a)

Obsidian

b)

Granite

c)

Diorite

d)

Basalt

16.

which is required to form an igneous rock?

a)

compaction

b)

high pressure

c)

solidification of molten material

d)

running water

17.
Stone Mountain is mainly composed of granite. What does that mean about its origin?
a)
It formed on Earth's surface.
b)
It formed below and then on Earth's surface.
c)
It formed on then below Earth's surface.
d)
It formed below Earth's surface.
18.
What do basalt, pumice, and obsidian have in common?
a)
They form on Earth's surface from the cooling of lava.
b)
They are fine-grained.
c)
Their crystal grains are small and hard to see.
d)
They have all of these things in common.
19.
What statement is true about the sample of diorite shown?
a)
Diorite is an extrusive igneous rock.
b)
Diorite is coarse-grained because its crystals are large and easy to see.
c)
Diorite is fine-grained because its crystals are small and hard to see.
d)
Diorite is a mineral because of its crystal structure.
20.
What is the name of this coarse-grained, intrusive igneous rock?
a)
obsidian
b)
marble
c)
granite
d)
scoria
21.

These dark colored igneous rocks are denser and rich in elements like magnesium.

a)

mafic

b)

felsic

c)

intrusive

d)

extrusive

22.

This word describes light colored igneous rocks with lots of elements like potassium, silica, and sodium.

a)

mafic

b)

felsic

c)

intrusive

d)

extrusive

23.

A rock's composition describes

a)

the size and position of its crystals.

b)

the minerals and materials that make up the rock.

c)

the color of the powder a rock leaves behind.

d)

how a rock breaks.

24.

How do igneous rocks form?

a)

Intense heat and pressure changes a rock chemically.

b)

Rocks burn into ash and reform.

c)

Magma or lava cools and hardens.

d)

Layers of sediment put pressure on each other and harden.

25.

Igneous rocks that form on Earth's surface.

a)

lava

b)

intrusive

c)

extrusive

d)

magma

26.

Which of the following statements is true about the rock pictured? (Choose two)

a)

It cooled very quickly.

b)

It cooled very slowly.

c)

It cooled on Earth's surface.

d)

It cooled underground.

27.

This texture indicates that the rock is igneous because

a)

It is light colored

b)

It is fine-grained

c)

It is vesicular

d)

It contains quartz

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