Download Example - Geology I: 5(A,C)

Name
Date
Pd.
Geology Unit 2 Homework Packet
Chapter 5
1. Finish the following definition: An element
2. What are the five characteristics of a mineral?
a.
b.
c.
d.
e.
3. Draw a sketch of how minerals form via the Pressure Process. Include the summary of each stage.
4. What are the other two ways that minerals can form?
(Hint, there is one in your book, and one from your notes).
5. Identify the following types of crystal structures:
a.
b.
c.
6. When a mineral does NOT exhibit cleavage, its breakage pattern is called
.
7. Explain why diamond and graphite have a different hardness, though they are both made of carbon.
Match the following types of luster to their descriptions:
_____ 8.
_____ 9.
_____ 10.
_____ 11.
_____ 12.
Micaceous
Metallic
Vitreous
Non-metallic
Earthy
a. The mineral is not shiny and looks dirty or plain, ex. - sulfur
b. The mineral appears sparkly or looks like it is made of glitter
c. The mineral does not shine like a metal, ex. - hornblende
d. The mineral shines like glass, ex. - quartz
e. The mineral has a shine like polished metal, ex. - galena
13. Explain why streak is a useful property for identifying minerals.
14. Assume the weights on the arm of this Dial-O-Gram are set at
zero. What is the weight of this specimen?
15. The weight of a mineral in AIR is 5.49 grams. The weight of the same mineral in WATER is 2.62 grams.
Use the formula in the textbook to find the Specific Gravity of your mineral.
16. What is the chemical formula of Quartz?
17. Name two examples of a silicate mineral and one example of an oxide mineral. Describe the
distinguishing characteristics of each mineral.
Example (list 2)
Distinguishing Characteristics
Silicate
Oxide
18. Name two ways to distinguish between orthoclase and plagioclase feldspars.
The chart below graphically depicts a range of seven rock-forming minerals that typically make up igneous
rocks. Four such rocks are identified at the top of the chart. Copy the 0-100% scale on the left of the chart
onto the edge of a piece of paper. Use your scale to read the percent of a given mineral in the particular rocks
marked by the red vertical lines.
For example, to find the percent of
quartz in tonalite, slide your scale to the
vertical line marked tonalite. Read the
percent of quartz at the line between
quartz and potassium feldspar. About
35% of the tonalite’s volume is quartz.
19. Which rock contains pyroxene?
20. Find the percent of potassium feldspar in the tonalite.
21. Identify the rock containing 40% potassium feldspar, 35% quartz, 12% plagioclase feldspar, 8% biotite,
and 5% amphibole.
Name each of the following steps in the flow chart below to describe the rock-forming process.
22.
23._
______
Example:
Example:
Si, O
Quartz, Feldspar
24.
Example:
Granite