Shared Flashcard Set

Details

midterm
vocab words
51
Geology
9th Grade
01/01/2012

Additional Geology Flashcards

 


 

Cards

Term

Glaciers

thick masses of ice orginationg on land from the compaction and recrystalization of snow that shows evidence of past or present flow

Definition
Term
Earthquake A vibration of the ground caused by the sudden release of energy
Definition
Term
Earthquake
Definition
A vibration of the ground caused by the sudden release of energy
Term
Glaciers
Definition
thick masses of ice orginationg on land from the compaction and recrystalization of snow that shows evidence of past or present flow
Term
P-wave
Definition
Earthquake wave that pushes and pulls rocks in the direction of the wave
Term
Lithosphere
Definition
The rigid outer layer of Earth, including the crust and upper mantle
Term
Continental Drift
Definition
A hypothesis that origanlly proposed that the continents had once been joined to form a single supercontinent
Term
Asthenosphere
Definition
A weak plastic layer of the mantle situated below the lithosphere
The solid, plastic layer of the mantle beneath the lithosphere; made of mantle rock that flows very slowly, which allows tectonic plates to move on top of it
Term
Convergent boundary
Definition
A boundary in which two plates move together
Term
Divergent boundary
Definition
A region where the rigid plates are moving apart, typified by the oceanic ridge
Term
Mid-Alantic Ridge
Definition
A volcanic area at divergent plate boundaries
Term
Trench
Definition
A surface feature in the seafloor produced by the descending plate during subduction
Term
Focus
Definition
The point within Earth where an earthquake originates
Term
Pangaea
Definition
The proposed supercontinent that 200 million years ago began to break apart and form the present landmasses
Term
Surface Waves
Definition
A seismic wave that travels along the surface of the Earth
Term
S-wave
Definition
A seismic wave that shakes particles perpendicular to the direction the wave is traveling
Term
Epicenter
Definition
Epicenter
Term
Epicenter
Definition
A logarithmic scale of 1 to 10 used to express the energy released by an earthquake
Term
Seismograph
Definition
An instrument that records earthquake waves
Term
Sedimentary
Definition
Type of rock formed from pressure, heat, or chemical change
Term
mineral
Definition
solid chemical substances found in the Earth's crust
Term
metamorphic
Definition
type of rock formed from either a sedimentary or igneous rock
Term
geology
Definition
the study of all that is physical about the earth
Term
fossil
Definition
the trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock
Term
subduction
Definition
a boundary in which a denseoceanic plate collides under a less dense crust
Term
igneous
Definition
rock formed from magma that has cooled and solidified
Term
erosion
Definition
the process by which wind, water, ice, or gravity transports soil and sediment from one location to another
Term
weathering
Definition
the natural process by which atmospheric and environmental agents, such as wind, rain, and termperature changes, disintegrate and decompose rocks
Term
plate tectonics
Definition
a theory stating that the earth's surface is broken into plates that move
Term
Magma
Definition
Molten rock in the earth's crust
Term
Lava
Definition
Magma that has reached Earth's surface
Term
Hot spring
Definition
Ground water in contact with hot rocks become heated, and discharges at surface
Term
Basalt
Definition
mafic rock found mainly in island volcanoes
Term
Cleavage
Definition
the way a mineral breaks along preferred planes of weakness
Term
Luster
Definition
the way light reflects off the mineral
Term
Syncline
Definition
A fold in which the youngest layer is in the center of the fold.
Term
Anticline
Definition
A fold in which the oldest layer is in the center of the fold.
Term
Hanging wall
Definition
In a nonvertical fault, the rock above the fault plane.
Term
Footwall
Definition
The rock below the fault plane.
Term
Normal fault
Definition
A fault in which the hanging wall moves downward relative to the footwall.
Term
Reverse fault
Definition
A fault in which the hanging wall moves upward relative to the footwall.
Term
Strike-slip fault
Definition
A fault in which the rock on either side of the fault plane slides horizontally in response to shear stress.
Term
Hot spots
Definition
Volcanically active areas that lie from tectonic plate boundaries.
Term
Intrusion
Definition
magma that forces its way into rocks and hardens.
Term
Quartz
Definition
Gives no elements to soil, primary, very resistant, arid
Term
calcite
Definition
Ca, secondary, low resistance, Arid
Term
Porosity
Definition
Volume percent of VOID space
Term
Rock Cycle
Definition
the process by which one rock type changes into another rock type or
the changes over time from igneous to sedimentary to metamorphic rock and back to igneous rock
Term
Aquifer
Definition
A geological formation or structure that stores and/or transmits water, such as to wells and springs.
Term
water table
Definition
the top of the water surface in the saturated part of an aquifer.
Term
granite
Definition
a type of rock containing the minerals feldspar, quartz, mica and hornblende
Supporting users have an ad free experience!