Mineral Worksheet #1 Answers and Exam Review Exam Tomorrow, March 14th.
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Transcript of Mineral Worksheet #1 Answers and Exam Review Exam Tomorrow, March 14th.
Mineral Worksheet #1 Answers and Exam
Review
Exam Tomorrow,March 14th
1. The way a mineral reflects or “reacts” to light.a. Native Element
2. A mineral’s resistance to being scratched. b. Cubic
3. Magnetic c. Hexagonal
4.This crystal system has three axes that all intersect at oblique angles.
d. Effervesces
5.The color of a mineral’s powder when rubbed across an unglazed porcelain plate.
e. Monoclinic
6. When minerals don’t break along cleavage lines.f. Crystalline Solid
7.This crystal system has three axes of different length that intersect at 90 degree angles.
g. Fracture
8. When a mineral exists as a single element. h. Color
9.This crystal system has 3 axes of equal length that intersect at 90 degree angles.
i. Orthorhombic
10
This crystal system has three horizontal axes that are the same length and intersect at 60 degree angles, and one longer vertical axis.
j. Hardness
11
This crystal system has three axes, two of which intersect at right angles and one that intersects the other two a an oblique angle.
k. Triclinic
12
This is when a mineral reacts with a weak acid to produce bubbles.
l. Streak
13
This is the plane or planes in which a mineral tends to split. m. Luster
14
Glows when a black light is shined on a mineraln. Fluorescence
15
The most misleading property of a mineral, in terms of determining its identity
o. Magnetic
16
This is something that has its atoms arranged in a repeating pattern.
p. Cleavage
mj
ok
l
g
i
a
b
c
e
dp
n
h
f
17. What are four conditions that define a mineral?
•naturally occurring•abiotic•repeating pattern of atoms (crystal)
•definite chemical composition
18. What is 1 reason that color isn’t a good method of identifying minerals?
•more than one mineral can have a particular color
•a mineral can exist as more than one color
•some minerals change color over time
19. What are the two types of luster?
•metallic •non-metallic
20. List as many of the acceptable adjectives for luster as you can. Next to each adjective, write a description and give one mineral that can be used as an example of that type of luster.• waxy
• vitreous• dull• earthy• adamanti
ne• pearly• silky• greasy• resinous
• like a candle
• glassy• well, dull• no luster• most
brilliant• like a pearl• like a silk
shirt• an oily
sheen• syrupy-
shiny
• rose quartz
• crystal quartz
• red hematite
• limonite• diamond• muscovite• malachite• talc• sulfur
21. List as many of the acceptable adjectives for fracture as you can. Next to each, write a description and give one mineral that can be used as an example of that type of fracture.•conchoi
dal •even•fibrous•splintery•uneven•brittle•sectile
• like sea-shell
•smooth•stringy•needles• less
smooth•crumbly•can be
carved
• rose quartz
•kaolinite•gypsum•malachit
e•magnetit
e• limonite•sulfur
22. For properties of luster and fracture, we are restricted in the words we can use. Explain why do we use a reduced vocabulary?
•a reduced vocabulary increases the objectivity and improves accuracy.
23. There are a few minerals that you have worked with over the past week that are very distinctive and should be able to be identified by sight only. Name one mineral that you can (or should be able to) identify simply by looking at it. Explain what is so distinctive about this mineral, that allows you (or should) to do this.
24. There are two ways to describe cleavage, describe what they are and how they are used.
•quality of the cleavage (how easily it is seen or detected)
• the planes (& angles) of the cleavage.
25. Name one mineral that has an easy to see cleavage.
26. List three tests that you could perform on a mineral to help identify it.
- hardness (Moh’s hardness scale)- streaking (to see the color)- weak acid test (effervescence)- black light (fluorescence)
27. Of all the tests that can be performed on a mineral to help identify it, which one is the most useful? Why?
28.Write the defining mineral for each level of the Moh’s Hardness Scale in the table below.
Moh’s Hardness Number
Defining Mineral
1
2
3
4
5
6
7
8
9
10
TalcGypsumCalciteFluoriteApatite
Orthoclase FeldsparQuartzTopaz
CorundumDiamond
29.List the tools that are used to determine hardness. Write the Moh’s hardness number next to each tool.
Tool Moh’s Hardness Number
Fingernail
Steel Nail
Glass Plate
Streak Plate
2.54.55.5
5 - 8
30. Why does the hardness of some minerals have such a large range?
- minerals naturally occurring and can vary in hardness because of natural variation
31. List six of the eight most common elements in the earth’s crust?
- oxygen (O)- silicon (Si)- aluminum (Al)- iron (Fe)- calcium (Ca)- sodium (Na)- potassium (K)- magnesium (Mg)
32. Define the word abiotic?
Natural, but not from or of any biological or living organism.
33. What is one way that minerals form?
- hot magma or lava cools- water containing minerals
evaporates- sustained heat and pressure
change one mineral into another
34. Why do we study minerals?
- minerals are the starting point for understanding ALL geologic phenomena
35. You have studied minerals for approximately two weeks. What is a rock and how is it different than a mineral?Rocks are made of an
aggregate (gathering or mixture bound into one object) of minerals.