Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ch.12

vocabulary

TermDefinition
Core the dense center of the earth made of solid and molten iron and nickel
Mantle the layer of the earth that surrounds the core; made of both molten magma and solid rock
Crust the thin, solid, rocky outermost layer of the earth
Differentiation the process of Earth materials separating and sorting by density resulting in a layered structure with the densest material (FE & NI) settling in the core
Tectonic Plate a large section of the earth’s crust that moves and carries everything on it
Hotspot a stationary, high temperature area of melting within the earth mantle that can last for several millions of years where superheated mantle magma rises towards the surface.
Rift valley A long, narrow rip or opening, made by the stretching pulling or splitting apart of the earth’s crust through which mantle magma reaches the surface adding new crust to the edge of a tectonic plates
Seafloor spreading the theory that oceans widen (open up) and continents are pushed apart as new crust is formed at mid ocean ridges
Plate tectonic the theory that the earth’s surface is made of large sections of crust that move and interactive with each other
Continental drift the theory that the major landmasses of the earth were once part of one large single super continent that broke apart 200 million years ago
Mid Ocean Ridge a long underwater mountain range that is split by a rift valley where mantle magma rises and forms new oceanic crust
Convection current the circular flow of magma within the molten part of the mantle as it heads up and cools down
Seismic wave a type of vibrating or shaking activity produced by the movement of earth's tectonic plates
Paleomagnetism a record of the earth’s magnetic field preserved by the alignment minerals in the rock of the earth’s crust time that the rocks were formed at the mid ocean ridge
Focus the point inside the earth where rock first moves starting an earthquake
Epicenter the point on the earth’s surface directly over the focus of an earthquake
Richter scale the scale used to measure the magnitude or strength of an earthquake
Deformation the process of physically changing the earth’s crust as a result of tectonic forces
Viscosity the ability of a substance to resist flowing
Fault a break or fracture in the earth’s crust caused by tectonic forces
Seismologist a scientist that studies the behaviors and characteristics of earthquake
Lag time the amount of time that passes between the arrival of the first P wave and the first S wave
Magnitude a measure of the amount of energy released during an earthquake
Continental Margin the edges of the continents below sea level that represent the shallowest parts of the oceans
Plate boundary an area on the earth’s surface where the edges of tectonic plates are interacting
Subduction the geologic process by which one tectonic plate is forced downward into the mantle under another tectonic plate
Ring of Fire an area of high subduction activity and frequent volcanic eruptions surrounding the pacific plate
Geothermal Energy a renewable energy source that originates from the earth’s own internal heat
Tectonic Forces forces generated from within the earth that result in uplift movement or deformation of the earth’s crust
Volcanic arc an arcing chain volcanic islands or volcanic mountains formed by a subduction of an oceanic plate into the mantle under another tectonic plate
Created by: robertocp2