Make A Field Guide For Minerals

Background: Have you ever used a field guide to identify a bird, flower, rock, or insect? If so, you know that field guides include more than photographs. A typical field guide for minerals might include background information about minerals in general and specific information about the formation, properties, and uses of each mineral.

Question: Which mineral properties should be included in a field guide to help identify unknown minerals?

Materials

Choose materials that would be appropriate for this lab.

mineral samples piece of copper magnifying lens paper clip glass plate magnet streak plate dilute hydrochloric acid the Mohs scale of mineral dropper hardness Reference Handbook steel file or nail

Safety Precautions

Procedure

1. Read and complete the lab safety form.

2. As a group, list the steps that you will take to create your field guide. Keep the available materials in mind as you plan your procedure.

3. Should you test any of the properties more than once for any of the minerals? How will you determine whether certain properties indicate a specific mineral?

4. Design a data table to summarize your results. Be sure to include a column to record whether or not a particular test will be included in the guide. You can use this table as the basis for your field guide.

5. Read over your entire plan to make sure that all steps are in a logical order.

6. Have you included a step for additional research? You might have to use the library or glencoe.com to gather all the necessary information for your field guide.

7. What additional information will be included in the field guide? Possible data include how each mineral formed, its uses, its chemical formula, and a labeled photograph or drawing of the mineral.

8. Make sure your teacher approves your plan before you proceed.

Analyze and Conclude

1. Interpret Which properties were most reliable for identifying minerals? Which properties were least reliable? Discuss reasons that one property is more useful than others.

2. Observe and Infer What mineral reacted with the hydrochloric acid? Why did the mineral bubble? Write the balanced equation that describes the chemical reaction that took place between the mineral and the acid.

3. Summarize What information did you include in the field guide? What resources did you use to gather your data? Describe the layout of your field guide.

4. Evaluate the advantages and disadvantages of field guides.

5. Conclude Based on your results, is there any one definitive test that can always be used to identify a mineral? Explain your answer.

WKITINQ Î4V

Earth Science

Peer Review Trade field guides with another group and test them out by using them to identify a new mineral. Provide feedback to the authors of the guide that you

Download quizzes, key terms, and flash cards from glencoe.com.

BIG (Idea

Minerals are an integral part of daily life.

Vocabulary

What is a mineral?

cleavage (p. 92) crystal (p. 87) fracture (p. 93) hardness (p. 91) luster (p. 90) mineral (p. 86) specific gravity (p. 95) streak (p. 93)

Section 4.2

Types of Minerals gem (p. 101) ore (p. 100) silicate (p. 96) tetrahedron (p. 96)

104 Chapter 4 • Study Guide

Albert Copley/Visuals Unlimited

Key Concepts

MAUWJdSa Minerals are naturally occurring, solid, inorganic compounds or elements.

• A mineral is a naturally occurring, inorganic solid with a specific chemical composition and a definite crystalline structure.

• A crystal is a solid in which the atoms are arranged in repeating patterns.

• Minerals form from magma or from supersaturated solutions.

• Minerals can be identified based on their physical and chemical properties.

• The most reliable way to identify a mineral is by using a combination of several tests.

Supersaturated Solution Minerals

immn4BBB Minerals are classified based on their chemical properties and characteristics.

• In many silicates, one silicon atom bonds with four oxygen ions to form a tetrahedron.

• Major mineral groups include silicates, carbonates, oxides, sulfides, sulfates, halides, and native elements.

• An ore contains a useful substance that can be mined at a profit.

• Gems are valuable minerals that are prized for their rarity and beauty.

Picture Silicon Oxygen Tetrahedron

Earth.^ Scient^

Vocabulary PuzzleMaker glencoe.com

104 Chapter 4 • Study Guide

Albert Copley/Visuals Unlimited

Use what you know about the vocabulary terms listed on the Study Guide to answer the following questions.

1. What is a naturally occurring, solid, inorganic compound or element?

2. What term refers to the regular, geometric shapes that occur in many minerals?

3. What is the term for minerals containing silicon and oxygen?

Explain the relationship between the vocabulary terms in each pair.

5. silicate, tetrahedron

Complete the sentences below using vocabulary terms from the Study Guide.

6. Minerals that break randomly exhibit_.

7. The test determines what materials a mineral will scratch.

Understand Key Concepts

Use the photo below to answer Question

Mineral Property Streak

8. Which mineral property is being tested?

A. texture C. cleavage

B. hardness D. streak

9. Which property causes the mineral galena to break into tiny cubes?

A. density C. hardness

B. crystal structure D. luster

Setone v Chapter Test glencoe.com

10. What characteristic is used for classifying minerals into individual groups?

A. internal atomic structure

B. presence or absence of silica tetrahedrons

C. chemical composition

D. density and hardness

11. A mineral has a mass of 100 g and a volume of 50 cm3. What is its density?

12. What is the correct chemical formula for a silica tetrahedron?

A. SiO2

SiO44

Si2O2

Use the diagram below to answer Questions 13 and 14.

Silicate Tetrahedron

13. Where do the tetrahedra bond to each other?

A. the center of the silicon atom

B. at any oxygen atom

C. only the top oxygen atom

D. only the bottom oxygen atoms

14. What group of minerals is composed mainly of these tetrahedra?

A. silicates C. carbonates

B. oxides D. sulfates

15. Which is an example of a mineral whose streak cannot be determined with a porcelain streak plate?

A. hematite

B. gold

C. feldspar

D. magnetite

Chapter 4 • Assessment 105

Matt Meadows

Chapter il Assessment

Chapter ¿J Assessment

16. Which is one of the three most common elements in Earth's crust?

A. sodium

B. silicon

C. iron

D. carbon

Use the table below to answer Question 17.

Mineral Formulas

Name

Formula

Quartz

SiO2

Feldspar

NaAlSi3O8— CaAl2Si2O8 & KalSi3O8

Amphibole

Ca2(Mg,Fe)5Si8O22(OH)2 Fe7Si8O22(OH)2

Olivine

(Mg,Fe)2SiO4

17. What determines the variation in chemical composition among the minerals listed in the table?

A. rate of magma cooling

B. temperature of the magma

C. presence or absence of water

D. changes in pressure

18. Calcite is the dominant mineral in the rock limestone. In which mineral group does it belong?

A. silicates C. carbonates

B. oxides D. sulfates

19. What mineral fizzes when it comes in contact with hydrochloric acid?

A. quartz C. calcite

B. gypsum D. fluorite

20. Dull, silky, waxy, pearly, and earthy are terms that best describe which property of minerals?

A. luster

B. color

C. streak

D. cleavage

21. For a mineral to be considered an ore, which requirement must it meet?

A. It must be in demand.

B. Its production must not generate pollution.

C. It must be naturally occurring.

D. Its production must generate a profit.

106 Chapter 4 • Assessment

Martin Bond/Photo Researchers

Constructed Response

22. Explain why rubies and sapphires, which are both forms of the mineral corundum, are different colors.

23. Describe the visual effect of placing a piece of clear, Iceland spar on top of the word geology in a textbook.

24. Summarize the formation of sugar crystals in a glass of sugar-sweetened hot tea.

25. Hypothesize which mineral properties are the direct result of the arrangement of atoms or ions in a crystal. Explain your answer.

26. Compare and Contrast Diamond and graphite have the same chemical composition. Compare and contrast these two to explain why diamond is a gem and graphite is not.

Think Critically

27. Describe the differences that might be exhibited by the garnets listed in Table 4.1.

Use the figure below to answer Question 28.

Use the figure below to answer Question 28.

Pyrite Compared Gold

28. Illustrate what the atomic structure might be if the crystal shape is an external reflection of it.

29. Recommend which minerals, other than diamond, would be best for making sandpaper. Explain your answer. Refer to Table 4.2.

Earth j.

flciMieqp Chapter Test glencoe.com

Chapter Assessment

30. Decide which of the following materials are not minerals, and explain why: petroleum, wood, coal, steel, concrete, and glass.

31. Infer how early prospectors used density to determine whether they had found gold or pyrite in a mine.

32. Assess Imagine that a new gem is discovered that is more beautiful than the most stunning diamond or ruby. Assess the factors that will determine its cost compared to other known gems.

Use the figure below to answer Questions 33-34.

33. Infer Mica is a mineral with a sheet silicate structure. The atomic arrangement is shown above. Infer what is holding these sheets, which consist of negatively charged silicon-oxygen tetrahedra, together.

34. Describe the type of fracture that occurs in minerals with the atomic arrangement shown.

Concept Mapping

35. Create a concept map using the following terms: silicates, oxides, halides, sulfates, sulfides, native elements, and carbonates. Add any other terms that are helpful. For more help, refer to the Skillbuilder Handbook.

Challenge Question

36. Arrange In addition to sheet silicates, there are chain silicates, tectosilicates, and cyclosilicates. Arrange six silica tetrahedra in a cyclosilicate form. Be sure to bond the oxygen atoms correctly.

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ScJ*nc v Chapter Test glencoe.com

Additional Assessment

37. WSSSHEEb Earth Science Imagine that you are planning a camping trip. What tools should you pack if you want to identify interesting minerals? How would you use these tools?

jQjUH Document-Based Questions

Data obtained from: Plunkert, P.A. 2005. Mineral resource of the month: Aluminum. Geotimes 50:57.

Aluminum is the second most-abundant metallic element in Earth's crust. It is lightweight, bendable, corrosion resistant, and a good conductor of electricity. It is used most often in the manufacture of cars, buses, trailers, ships, aircraft, railway and subway cars. Other uses include beverage cans, aluminum foil, machinery, and electrical equipment.

Aluminum is produced from bauxite (hydrated aluminum-oxide) deposits, located mostly in Guinea, Australia, and South America. The United States does not have bauxite deposits; it imports it from Brazil, Guinea, and Jamaica. Total world aluminum production is approximately 30 million metric tons per year. U.S. aluminum production is less than U.S. aluminum consumption. Leading aluminum producers are China and Russia. A major part (3 million metric tons per year) of the U.S. aluminum supply comes from recycling.

38. Interpret the relationship between aluminum's resistance to corrosion and its use in transportation vehicles.

39. Propose a plan for how the United States can increase aluminum production without increasing the amount it imports.

40. Predict the possible effects an increase in

U.S. production would have on Guinea, Jamaica, and China.

Cumulative Review

41. How do different isotopes of an element differ from each other? (Chapter 3)

42. Why is an understanding of the study of Earth science important to us as residents of Earth? (Chapter 1)

Standardized Test Practice

Multiple Choice

1. What is the second most abundant element in Earth's crust?

A. nitrogen

B. oxygen

C. silicon

D. carbon

Use the table below to answer Questions 2 and 3.

Mineral Characteristics

Mineral

Hardness

Specific Gravity

Luster/Color

Feldspar

6-6.5

2.5-2.8

nonmetallic/colorless or white

Fluorite

4

3-3.3

nonmetallic/yellow, blue, purple, rose, green, or brown

Galena

2.5-2.75

7.4-7.6

metallic/grayish black

Quartz

7

2.65

nonmetallic/colorless in pure form

2. What is the hardest mineral in the table?

A. feldspar

B. fluorite

C. galena

D. quartz

3. Which mineral most likely has a shiny appearance?

A. feldspar

B. fluorite

C. galena

D. quartz

4. What can be inferred about an isotope that releases radiation?

A. It has unstable nuclei.

B. It has stable nuclei.

C. It has the same mass number as another element.

D. It is not undergoing decay.

5. How do electrons typically fill energy levels?

A. from lowest to highest

B. from highest to lowest

C. in no predictable pattern

D. all in one energy level

6. What is the most reliable clue to a mineral's identity?

A. color

B. streak

C. hardness

D. luster

Use the table below to answer Questions 7 and 8.

Mineral

Hardness

Talc

1

Gypsum

2

Calcite

B

Fluorite

4

Apatite

5

Feldspar

6

Quartz

7

Topaz

8

Corundum

9

Diamond

1G

7. Which mineral will scratch feldspar but not topaz?

A. quartz C. apatite

B. calcite D. diamond

8. What can be implied about diamond based on the table?

A. It is the heaviest mineral.

B. It is the slowest mineral to form.

C. It has the most defined crystalline structure.

D. It cannot be scratched by any other mineral.

9. A well-planned experiment must have all of the following EXCEPT

A. technology

B. a control

C. a hypothesis

D. collectible data

10. What name is given to the imaginary line circling Earth halfway between the north and south poles?

A. prime meridian

B. equator

C. latitude

D. longitude

Diamond Named Uncle Sam

Short Answer

Use the conversion factor and table below to answer Questions 11-13.

1.0 carat = 0.2 grams

Diamond

Carats

Grams

Uncle Sam: largest diamond found in United States

40.4

?

Punch Jones: second largest; named after boy who discovered it

?

6.89

Theresa: discovered in Wisconsin in 1888

21.5

4.3

2001 diamond production from western Australia

21,679,930

?

11. List the three diamonds from least to greatest according to carats, and list the carats.

12. How many kilograms of diamonds were produced in western Australia in 2001?

13. Why would a diamond excavator want to convert the diamond measurement from carats to grams?

14. Why are map scales important parts of a map?

15. Discuss how a scientist might use a Landsat satellite image to determine the amount of pollution being produced by a city.

16. How might a mineral no longer be classified as an ore?

Reading for Comprehension

Silicon Valley

Silicon (Si) is the second most abundant element in Earth's crust, but we didn't hear much about it until Silicon Valley. It is present in measurable amounts in nearly every rock, in all natural waters, as dust in the air, in the skeletons of many plants and some animals, and even in the stars. Silicon is never found in the free state like gold or silver, but is always with oxygen (O), aluminum (Al), magnesium (Mg), calcium (Ca), sodium (Na), potassium (K), iron (Fe), or other elements in combinations called the silicates. It is the largest and most complicated of all rock-forming minerals. It is dull gray in appearance and has a specific gravity of 2.42. It has valence electrons like carbon (C) and can form a vast array of chemical compounds like silicon carbide abrasive, silicon rubber and caulking, oils and paints. Pure silicon is used in semiconductors, as solar panels to generate electricity from light, and in microchips for transistors.

Article obtained from: Ellison, B. Si and SiO2...or what a difference a litte O makes. (online resource accessed October 2006.)

17. According to the text, what is the most challenging aspect of silicon?

A. It has valence electrons.

B. It is dull gray in appearance.

C. It is never found in its free state.

D. It is present in many places.

18. Which is NOT a use of silicon as a chemical compound given in this passage?

A. silicon rubber and caulking

B. silicon carbide abrasive

C. microchips for transistors

D. oils and paints

19. Why was silicon not widely known until Silicon Valley?

NEED EXTRA HELP?

If You Missed Question . . .

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Standardized Test Practice glencoe.com

Chapter 4 • Assessment 109

Igneous Rocks m.

BIGi Idea

Igneous rocks were the first rocks to form as Earth cooled from a molten mass to the crystalline rocks of the early crust.

5.1 What are igneous rocks?

m<m Igneous rocks are the rocks that form when molten material cools and crystallizes.

5.2 Classification of Igneous Rocks iMAIN<beh Classification of igneous rocks is based on mineral composition, crystal size, and texture.

GeoFacts

In the monument pictured here, Crazy Horse's head is over 26 m tall.

The monument, located in South Dakota, was started in 1948 and is still a work in progress. The next component created will be his arm, which will measure more than 70 m.

When completed, the monument will be more than 170 m tall and 195 m long. Nearly 10,000,000 metric tons of rock have already been blasted away.

Geology Rocks Mineral Picture

LAUNCH L

How are minerals i dentified?

Igneous rocks are composed of different types of minerals. It is often possible to identify the different minerals in a sample of rock.

Procedure ^ EH IC

1. Read and complete the lab safety form.

2. Examine a sample of granite from a distance of about 1 m. Record your observations.

3. Use a magnifying lens or microscope to observe the granite sample. Record your observations.

Analysis

1. Illustrate what you saw through the magnifying glass or microscope. Include a scale for your drawing.

2. List the different minerals that you observed in your sample.

3. Describe the sizes and shapes of the mineral crystals.

4. Describe any evidence that suggests that these crystals formed from molten rock.

Types of Igneous Rocks Make this Foldable to compare intrusive and extrusive igneous rock.

STEP 1 Fold the bottom of a horizontal sheet of paper up about 3 cm.

STEP 2 Fold in half.

STEP 1 Fold the bottom of a horizontal sheet of paper up about 3 cm.

STEP 2 Fold in half.

STEP 3 Unfold once, and dot with glue or staple to make two pockets. Label as shown.

r

n

Extrusive Rock

Intrurive Rock

IFfiMUIjl* Use this Foldable with Section 5.1.

As you read this section, use index cards or quarter sheets of paper to summarize how each type of rock forms and give examples.

Earth ^

Scienc^prilln

Visit glencoe.com to ^ study entire chapters online;

► explore h Mqjj^ animations:

• Interactive Time Lines

• Interactive Figures

• Interactive Tables

^ access Web Links for more information, projects, and activities;

► review content with the Interactive Tutor and take Self-Check Quizzes.

Section 5.1

Objectives

I Summarize igneous rock formation.

I Describe the composition of magma.

I Identify the factors that affect how rocks melt and crystallize.

Review Vocabulary silicate: mineral that contains silicon and oxygen, and usually one or more other elements

New Vocabulary lava igneous rock partial melting Bowen's reaction series fractional crystallization

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Responses

  • nazario
    What are the visual effect of placing a piece of clear iceland spar on top of the word geology?
    8 years ago
  • bonnie benedict
    What characteristic is used for classifying minerals into individual groups?
    8 years ago
  • ambra
    What characteristics is used to classifying minerals into individual groups?
    8 years ago
  • gary
    Which minerals most likely has a shiny appearance?
    8 years ago
  • lea
    What information is included in a field guide for minerals?
    8 years ago
  • elen abrha
    Which property causes the mineral galena to break into tiny cubes?
    6 years ago
  • lorene samuelson
    How to make a field guide?
    6 years ago
  • joona
    What mineral most likely has a shiny appearance?
    6 years ago
  • bisrat
    Why would a diamond excavator want to convert the diamond measurement from carats to grams?
    4 years ago
  • Wolfgang
    What chaacteristics is used for classifying minerals into individual groups?
    4 years ago
  • Brandon
    What term refers to the regular geometric shape that occur in many minerals?
    4 years ago
  • Haiduc Bunce
    Which mineral most likely has a shiny appearance feldspar fluorite galena and quartz?
    3 years ago
  • Inaaya
    How to make a field guide about minerals?
    3 years ago
  • Hildigrim Bolger
    How to make a rock and mineral field guide?
    3 years ago
  • Isumbras Puddifoot
    What term refers to the regular, geometric shapes that occur in many minerals?
    2 years ago

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