ESS 101 B Exam 2 Questions and Answers Latest 2025
(Introduction to Geology and Societal Impacts)
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.
The class has earned 5 extra credit participation points for your direct involvement in lecture
discussions. I will add those points after I compile the final midterm 2 grade, which I will make out 80
points.
Attempt History
Attempt Time Score Regraded
LATEST Attempt 1 57 minutes 82.67 out of 88 80.67 out of 88
Question 1 pts
,A volcanic (aphanitic) rock has 30% quartz, 50 potassium feldspar, 5% muscovite and amphibole. What
would the rock be called according to the chart?
Basalt
Rhyolite
Diorite
Granite
Andesite
Question 2 pts
, The attached image is an obsidian sample. Which of the following statements are not true regarding
obsidian? (3 answers are correct)
it contains trace amounts of magnetite
the magma it formed from would be low viscosity
it will break along even cleavage planes
it contains Fe-Mg rich amphibole which makes it look dark
it is a silica-rich rock
Question 3 pts
(Introduction to Geology and Societal Impacts)
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.
The class has earned 5 extra credit participation points for your direct involvement in lecture
discussions. I will add those points after I compile the final midterm 2 grade, which I will make out 80
points.
Attempt History
Attempt Time Score Regraded
LATEST Attempt 1 57 minutes 82.67 out of 88 80.67 out of 88
Question 1 pts
,A volcanic (aphanitic) rock has 30% quartz, 50 potassium feldspar, 5% muscovite and amphibole. What
would the rock be called according to the chart?
Basalt
Rhyolite
Diorite
Granite
Andesite
Question 2 pts
, The attached image is an obsidian sample. Which of the following statements are not true regarding
obsidian? (3 answers are correct)
it contains trace amounts of magnetite
the magma it formed from would be low viscosity
it will break along even cleavage planes
it contains Fe-Mg rich amphibole which makes it look dark
it is a silica-rich rock
Question 3 pts
