3/11/25, 8:34 PM
ESS101 Exam 2| Actual Questions and Answers
Latest Updated 2025/2026 (Graded A+)
Due at 9pm Points 88 Questions 42
Time Limit 60 Minutes
Instructions
Dear Class:
There are 40 (some multiple questions) regular test questions taken from ESS 101 PowerPoint lecture
material and special readings related to human interactions with geologic processes and materials.
Each regular test question is worth 2 points. The exam is worth 80 points towards your total score out of
400, but will show being out 88 because of the 8 bonus points).
There are also 4 bonus questions worth 2 points each that will be counted towards your total points, but
are extra credit.
I will compile the final Examination 2 grade out of 80 points.
Note I will have my office hours open if you have questions.
This quiz was locked Feb 23 at 9pm.
Attempt History
Attempt Time Score
LATEST Attempt 1 57 minutes 88 out of 88
Correct answers are hidden.
Score for this quiz: 88 out of 88
Submitted Feb 23 at 8:56pm
This attempt took 57 minutes.
Question 1 pts
1/28
,3/11/25, 8:34 PM
A phaneritic (plutonic) rock has 30% quartz, 15% plagioclase, 45%
potassium feldspar, 5% amphibole and 5% muscovite. What would the
rock be called according to the chart?
Diorite
Rhyolite
Basalt
Granite
Andesite
Question 2 pts
The attached image is an obsidian sample. Which of the following
statements are not true regarding obsidian?
2/28
, 3/11/25, 8:34 PM
(3 answers are correct)
it is a silica-rich rock
the magma it formed from would be low viscosity
it will cleave along well-defined weakness planes
it contains trace amounts of magnetite
it contains Fe-Mg rich amphibole which makes it look dark
Question 3 pts
Which two igneous rocks listed below are classified based on their
fragmental textures?
(multiple answer question)
3/28
ESS101 Exam 2| Actual Questions and Answers
Latest Updated 2025/2026 (Graded A+)
Due at 9pm Points 88 Questions 42
Time Limit 60 Minutes
Instructions
Dear Class:
There are 40 (some multiple questions) regular test questions taken from ESS 101 PowerPoint lecture
material and special readings related to human interactions with geologic processes and materials.
Each regular test question is worth 2 points. The exam is worth 80 points towards your total score out of
400, but will show being out 88 because of the 8 bonus points).
There are also 4 bonus questions worth 2 points each that will be counted towards your total points, but
are extra credit.
I will compile the final Examination 2 grade out of 80 points.
Note I will have my office hours open if you have questions.
This quiz was locked Feb 23 at 9pm.
Attempt History
Attempt Time Score
LATEST Attempt 1 57 minutes 88 out of 88
Correct answers are hidden.
Score for this quiz: 88 out of 88
Submitted Feb 23 at 8:56pm
This attempt took 57 minutes.
Question 1 pts
1/28
,3/11/25, 8:34 PM
A phaneritic (plutonic) rock has 30% quartz, 15% plagioclase, 45%
potassium feldspar, 5% amphibole and 5% muscovite. What would the
rock be called according to the chart?
Diorite
Rhyolite
Basalt
Granite
Andesite
Question 2 pts
The attached image is an obsidian sample. Which of the following
statements are not true regarding obsidian?
2/28
, 3/11/25, 8:34 PM
(3 answers are correct)
it is a silica-rich rock
the magma it formed from would be low viscosity
it will cleave along well-defined weakness planes
it contains trace amounts of magnetite
it contains Fe-Mg rich amphibole which makes it look dark
Question 3 pts
Which two igneous rocks listed below are classified based on their
fragmental textures?
(multiple answer question)
3/28
