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EA1110 Mid-Semester Recap 2024 Flashcards | StudBud
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EA1110 Mid-Semester Recap 2024
EA1110 Mid-Semester Recap 2024
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1
What silicate group does garnet belong to?
Nesosilicates (isolated)
Tectosilicates (framework)
Cyclosilicates (ring)
Phyllosilicates (sheet)
2
Why does Earth have a magnetic field?
Comes purely from Earth's rotation
Solar wind moves around the planet
Movement in the liquid outer core
Because earth has a lot of solid iron in it
3
Which of these is NOT part of the sulfide mineral group?
Galena
Chalcopyrite
Pyrite
Hematite
4
What type of molten rock is found in plutons?
Magma
Neither (just volatiles)
Lava
Both lava and magma
5
What type of volcanic edifice is this?
Caldera
Stratavolcano
Mt Doom
Shield volcano
6
What is the line called that reflects PT conditions where rocks begin to melt?
Eutectic
Solidus
Liquidus
Geothermal gradient
7
Which of these chemical sedimentary rocks will NOT react with acid?
Chert
Tufa
Travertine
Oolitic limestone
8
Which type of sedimentary rock can be described as having rounded, well sorted, medium sized grains?
Siliciclastic
All of them
Biogenic
Chemical
9
Why is this olivine sand beach unique?
Olivine is unstable at Earth's surface
Olivine is not easily eroded out of rocks
The blue sky shouldn't reflect green in minerals
Ocean chemistry stained the minerals green
10
How can you tell that this rock is extrusive?
There are visible crystals
Some of the material has a glassy lustre
All the crystals are visible
Some of the material is too fine-grained to see crystals
11
When planetary differentiation happened, where did most of the radioactive elements (U, Th, K) end up?
Mantle
Crust
Inner core
Outer core
12
Which of these is NOT a way to describe cleavage?
3 cleavage planes
Good
Prismatic
At 90 degrees
13
What is nucleosynthesis?
How electrons are made
How new elements are made
How the moon was made
How Earth got it's layers
14
Continental crust is typically much thicker than oceanic crust (?)
True
False
15
Granulite metamorphic facies rocks must be made with hydrated minerals or else they would melt (?)
True
False
16
What defines an element?
Number of neutrons
Number of protons
Ratio of protons and neutrons
Number of electrons
17
How many different minerals are known to exist?
360
6000+
2000
less than 30
18
What does bulk rock chemisty refer to?
Molar weight of silica in a rock
Degree of foliation
Chemical elements in a rock
Specific list of minerals in a rock
19
What is the NBO/T (non-bridging oxygen per tetrahedra) for cyclosilicates?
2
3
0
1
20
How long ago did the Big Bang happen?
66 million years ago
13.8 billion years ago
4.6 million years ago
13.8 thousand years ago
21
In which of these sedimentary environments are you most likely to find a breccia?
Delta
Alluvial fan
Lake
River
22
What metamorphic conditions was this rock subjected to?
Can't tell
Temperature and pressure
Pressure
Temperature
