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Exam 1
questions from exam 1
49
Geology
Undergraduate 2
12/07/2011

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Term
Lithified
Definition
loose 'unconsolidated' material has become a solid rock
Term
natural selection
Definition
principal mechanism behind evolutionary changes in biosphere
Term
Residence time
Definition
Amount of time matter is contained in specific reservoir
Term
granite is a rock that is typical of the:
Definition
continental crust
Term
how fast do tectonic plates move?
Definition
A few inches (roughly 1-2) per year
Term
Which of the following are components of the scientific method?
Definition
acquiring data and evaluating results, raising questions, creating hypotheses, making predictions
Term
contenintal on top, oceanic sliding underneath?
Definition
convergent plate boundary
Term
what are the three general classes of rocks that are defined based upon origin?
Definition
igneous, sedimentary, metamorphic
Term
who is Alfred Wegner?
Definition
first geologist to formulate a global explanation of how the contenents assumed their present locations and shapes
Term
What is the driving force behind plate tectonics?
Definition
mantle convection
Term
felsic rocks?
Definition
are more common in the continental crust, contain more silicon, sodium, and potassium than mafic rocks, commonly contain feldspar and quartz, do not have much iron and magnesium as mafic rocks
Term
What is lithosphere?
Definition
earths crust and upper mantle
Term
The Basin and RAnge province has lots of normal faults which suggest?
Definition
extension
Term
An example of ionic bonding is?
Definition
Na+ bonding to Cl-
Term
What is in the center of an atom?
Definition
Protons and neutrons
Term
When did life begin?
Definition
sometime between 4.2 and 3.5 billion years ago
Term
Whats true about oceanic crust compared to continental crust?
Definition
thinner and higher density
Term
Basalt igneous rock w/ crystals to small to see, whats this texture?
Definition
aphanitic
Term
Energy and matter in and out of open system are the same?
Definition
in a steady state
Term
Minimum number of seismic stations to locate earth quake?
Definition
3
Term
scale used (toal amount of seismic energy)
Definition
moment magnitude scale
Term
S waves?
Definition
slower than p-waves
Term
Hazards from earthquakes?
Definition
slope failure, surface rupture, fire, liquefication
Term
Rocks strained and break?
Definition
elastic rebound
Term
Rocks changed by heat, fluids, pressure?
Definition
metamorphic rocks
Term
hanging wall (on top) moves up
foot wall (on bottom) moves down
Definition
transform
Term
Magnetic reversals discovered where?
Definition
on ocean floor
Term
Geosphere interacts with the atmosphere where?
Definition
Volcano explodes gases and ash into he air
Term
Landmass 200 million years ago?
Definition
Pangea
Term
Ocean crust has more_____ than continental crust?
Definition
iron and magnesium
Term
Karst terrane and sinkholes caused by?
Definition
calcite
Term
Problem at Easter island?
Definition
carrying capacity overwhelmed
Term
Sustainable society consists of?
Definition
satisfying needs with out jeopardizing the future
Term
Foot wall(on bottom) move up
Hanging wall(on top) move down
Definition
normal
Term
Calcite symbol?
Definition
CaCO3 (<
Term
Which wave will arive 1st?
Definition
P-wave
Term
Age of Earth?
Definition
4.5 billion years
Term
Sedimentary rocks use to reconstruct past environment how?
Definition
Structures, texture, fossils, composition
Term
Plastic flow in mantel is what?
Definition
Asthenosphere
Term
NO igneous rocks and minerals at which boundary?
Definition
Transform plate boundary
Term
Steno's law?
Definition
Oldest layer is lowest
Term
Erosion consists of what?
Definition
Transportation
Term
4 common elments in geopsphere?
Definition
Oxygen, iron, silicon, magnesium
Term
What is done to prevent damage from basal shear?
Definition
base isolation
Term
Clays come from weathering (hydrolysis) of?
Definition
feldspar
Term
Alps and HImalayas is what type of plates process?
Definition
convergence of two continent-bearing plates
Term
Source of earthquake?
Definition
focus
Term
Ocean crust produced at?
Definition
Divergent boundaries
Term
MO earthquakes?
Definition
1811-1812
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