Shared Flashcard Set

Details

GEO 2200
exam 1
56
Geology
Undergraduate 1
03/04/2008

Additional Geology Flashcards

 


 

Cards

Term
What is weathering?
Definition
Weathering is the disintegration of rocks into mineral particles or the dissolution of rocks in water
Term
Where is weathering more common and why?
Definition
Near the ground, because plants, gravity, and precipitation need it more.
Term
What is physical weathering?
Definition
Without changing the chemical compositions (freeze thaw cycles, break rock apart)
Term
Where is physical weathering more dominant?
Definition
Dry and colder climates
Term
What is chemical weathering?
Definition
Where it changes the chemical composition (chemical reactions disintegrate rock)
Term
Where is chemical weathering more dominant?
Definition
in hot and wet regions
Term
What are the main forces that work on a slope or inclined surface?
Definition
coercion, friction, gravity
Term
Which approach helps pull particles away from the slope?
Definition
Gravity
Term
What is Karst landscape?
Definition
The continuing dissolution of rock minerals into water creates this landscape with caves and sinkholes
Term
Where are karst landscapes most often found?
Definition
Areas of the world underlain by extensive layers of limestone. Florida, Indiana, and the Yucatan Peninsula.
Term
Approx. what % of the Earth's surface has Karst features?
Definition
15%
Term
What are stalactites and stalagmites?
Definition

Stalactites grow from the ceiling and stalagmites build from the ground.

(C for ceiling) (G for ground) 

Term
What are the major processes of physical weathering (3)?
Definition

1)Frost Action

2)Crystallization

3)Biological Forces 

Term
What are the major processes of chemical weathering(3)?
Definition

1) Hydrolysis

2)Oxidation

3)Carbonation and Solution 

Term
What is mass movement? AKA mass wasting
Definition
applies to a movement of a body of material propelled and controlled by gravity
Term
What are the different mass movement processes?
Definition

MES-Mudflow, Earthflow,Solifunction

LS-Landslide,Slump

RC-Rockfall, creep 

Term
What are the classifying factors of mass movement processes? 
Definition
speed and moisture content
Term
What is a mid-oceanic ridge?
Definition

interconnected mountain chain about 64 km (40 mi) long and 1000 km wide.

 

40 mi long and 400 mi wide 

Term
are mid-ocean ridges convergent or divergent boundary?
Definition
It’s a divergent boundary.
Term
What is a subduction zone?
Definition
the deepest places in the oceans
Term
is the subduction zone a convergent or divergent boundary?
Definition

It’s a convergent boundary

Term
Where can you expect new crust generation – subduction zone or mid-oceanic ridge?
Definition
mid-oceanic ridge
Term
What is a hotspot?
Definition
individual sites of upwelling material arriving at the surface as tall plumes from the mantle
Term
How is a sunspot different from subduction zone or mid-oceanic ridge?
Definition
they remain fixed as the plates slide over them
Term
Is it possible to date sea-floor? How? (
Definition

yes, through the magnetic particles which are stored in the new erupted magma.

Term
What is the relationship between the axis of a mid-oceanic ridge and age of the sea-floor?
Definition

) as you move away from axis the age is older

Term
What is orogenesis?
Definition
Formation of mountains
Term
Give examples of continental-continental,
Definition
Masses of colliding continental crust are subjected to intense folding. NO rising magma
Term
continental-oceanic
Definition
it occurs along the pacific coast of the american continent
Term
oceanic-oceanic orogenesis
Definition
Rising magma creates underwater volcanoes that eventually reach the surface
Term
What kind of boundary produces volcanic islands arcs and chains?(Japan, Indonesia)
Definition
Oceanic Plate-Oceanic Plate
Term
What is a normal fault?
Definition
hanging wall goes down
Term
How is normal fault different from a reverse fault? 
Definition
Hanging wall goes up
Term
What is thrust?
Definition
reverse fault that has low angles.
Term
How can you measure earthquakes?
Definition
Seismic waves with two scales including intensity and magnitude
Term
What is epicenter?
Definition
Point on the surface directly above the focus
Term
What is the hypocenter?
Definition
subsurface area along the fault plane where the motion of seismic waves originate
Term
What is the role of a producer?
Definition
produce their own food using CO2 as their source of carbon
Term
What are consumers?
Definition
Organisms depending on producers or other consumers for their carbon source
Term
What is habitat?
Definition
address
Term
What is niche?
Definition
function
Term
What is the difference between a symbiotic and a parasitic relationship?
Definition
symbiotic-both animals are organisms that benefit from eachother…parasitic only one benefits
Term
What is ecological succession?
Definition
Succession may be initiated either by formation of new, unoccupied habitat
Term
What is food web/chain? Learn about the distribution of energy and/or food and pollutants in a food web
Definition
From producers>consumers>decomposers
Term
What do you mean by a limiting factor?
Definition
a physical or chemical abiotic component taht inhibits biotic operations through lack or excess
Term
What is trophic level?
Definition
organisms that share the same foods are said to be in the same trophic level
Term
What are the different trophic levels?
Definition
Primary consumers, secondary consumers, and tertiary consumers
Term
What are the biotic and abiotic components of an ecosystem?
Definition
Biotic is living and adbiotic is non living
Term
What are the essential components of photosynthesis?
Definition
water, light, carbon dioxide
Term
What is primary productivity?
Definition
net photosynthesis of a plant community
Term
What are the controlling factors of primary productivity?
Definition

energy, moisture content, insulation,

Term
When is there upwelling of the ridges?
Definition
mid-ocean
Term
What areas of descending crust?
Definition
subduction
Term
How many crusts is earth divided into?
Definition
14 plates (7 are largely than others)
Term
Which plates slide laterally with respect to each other at right angles to a sea floor spreading center?
Definition
transform boundaries
Supporting users have an ad free experience!