
Petrography Final

Quiz
•
Science
•
12th Grade
•
Easy
Ella Sailors
Used 7+ times
FREE Resource
101 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a typical extinction angle for orthopyroxene?
0 degrees
15 degrees
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To find the birefringence (δ) of a mineral, look for a mineral grain with the:
Lowest possible interference color
Highest possible interference color
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the range of wavelengths of radiation that humans can see?
400 to 800 nm
400 to 800 Å
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The refractive index(s) of a mineral can depend on the direction of light.
is the ratio of speed of light in a vacuum to the speed of light in the mineral
can depend on direction of light
are used to determine birefringence
all of the above
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the thickness of a standard thin section?
0.03 mm
3x10-10 m.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biaxial minerals have
2 optic axes and 2 indices of refraction
3 optic axes and 2 indices of refraction
2 optic axes and 3 indices of refraction
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An isotropic mineral:
Has no birefringence
Has no relief
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