© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

• Im

age

Cred

its:

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

• Im

age

Cred

its: (

tr) ©

Andr

e Je

nny/

Alam

y; (t

l) ©

Javi

er T

rueb

a/M

SF/P

hoto

Res

earc

hers

, Inc

.; (b

) ©Da

nny

Lehm

an/C

orbi

s

Name

VocabularyFill in the blank with the term that best completes the sentence.

1 The is a series of geologic processes in which rock can form, change from one type to another, be destroyed, and form again.

2 The rising of regions of Earth’s crust to higher elevations is called .

3 A(n) is a naturally occurring, solid combination of one or more minerals or organic matter.

4 is a physical property used to describe how the surface of a mineral reflects light.

Key ConceptsChoose the letter of the best answer.

6.6C, 6.2E

5 The table below lists the masses and volumes of four mineral samples.

Mineral Mass (g) Volume (mL)feldspar 16 6.2galena 9 1.2garnet 12 3.0quartz 10 3.7

Which mineral has the greatest density? (Hint: Step 1. Use the density equation to find the density of each mineral in the table. Step 2. Compare the densities you calculate to find the greatest value.)

A feldspar

B galena

C garnet

D quartz

Unit 6 Review

Unit 6 Review

Answers

381Unit 6 Review

6_CTXESE025523_U06 381 14/11/12 2:09 PM

Name: Date: Class: ©

Hou

ghto

n M

ifflin

Har

cour

t Pub

lishi

ng C

ompa

ny

113113Unit 6 Minerals and Rocks

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

6.10B

6 Declan observed a rock that he found at the beach. He concluded that the rock was sedimentary. Which observation best supports this conclusion? (Hint: Step 1. Recall how sedimentary rock is formed. Step 2. Decide which property sedimentary rock will have because of the way it forms.)

A the yellow color C the layers within the rock

B the hardness of the rock D the location where the rock was found

6.10B

7 Which of the following best describes how sedimentary rock forms?

A Molten rock beneath the surface of the Earth cools and becomes solid.

B Layers of material become compressed to form rock.

C Chemical processes or changes in pressure or temperature change the texture and composition of a rock.

D Molten rock reaches the surface and cools to become solid rock.

6.10B, 6.3B

8 The diagram shows portions of the rock cycle.

Suppose you were to add an arrow to show subsidence in the diagram. How would you draw the arrow?

A It would extend horizontally across the diagram.

B It would point upward toward the metamorphic rock.

C It would point downward from the metamorphic rock.

D It would point in the same direction as the uplift arrow.

Unit 6 Review continued

Answers

382 Unit 6 Minerals and Rocks

6_CTXESE025523_U06 382 14/11/12 2:10 PM

Name: Date: Class:

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

114114 Unit 6 Minerals and Rocks

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

Name

Unit 6 Review

6.6C, 6.2B

9 A student is shining a light on several different mineral samples. For which type of mineral should the student expect the greatest luster?

A a dull, chalky mineral

B a rough, grey mineral

C a shiny, metallic mineral

D a clear, translucent mineral

Gridded ResponseWrite the answer in the boxes, then bubble in the corresponding number in the grid below.

6.6C

10 The table below shows the Mohs hardness scale.

Hardness Mineral 1 talc 2 gypsum 3 calcite 4 fluorite 5 apatite 6 feldspar 7 quartz 8 topaz 9 corundum10 diamond

A student determines that the hardness of a penny is exactly between the hardnesses of calcite and fluorite. What is the hardness of the penny?

.0 0 0 0 0 0

1 1 1 1 1 1

2 2 2 2 2 2

3 3 3 3 3 3

4 4 4 4 4 4

5 5 5 5 5 5

6 6 6 6 6 6

7 7 7 7 7 7

8 8 8 8 8 8

9 9 9 9 9 9

Answers

383Unit 6 Review

6_CTXESE025523_U06 383 14/11/12 2:10 PM

Name: Date: Class: ©

Hou

ghto

n M

ifflin

Har

cour

t Pub

lishi

ng C

ompa

ny

115115Unit 6 Minerals and Rocks

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

Critical ThinkingAnswer the following questions in the space provided.

11 Explain how both the texture and the composition of a rock can provide scientists with information on the rock’s history. Give an example of each.

6.10B

12 Explain a way that a sedimentary rock could form, then over time break down into smaller pieces, and become sedimentary rock again in another location.

ESSENTIAL QUESTIONSLessons 2 and 3

Connect

Answer the following question in the space provided.

6.10B, 6.3B

13 A student is developing a model to show how one type of rock can undergo several changes and eventually form the same type of rock again. Describe two pathways the student can use to show how a metamorphic rock could become another type of rock and then become metamorphic once again.

Unit 6 Review continued

Answers

384 Unit 6 Minerals and Rocks

6_CTXESE025523_U06 384 14/11/12 2:11 PM

Name: Date: Class:

© H

ough

ton

Miff

lin H

arco

urt P

ublis

hing

Com

pany

116116 Unit 6 Minerals and Rocks