Shared Flashcard Set

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vocabulary
vocabulary
12
Science
6th Grade
02/10/2009

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Cards

Term
fossil
Definition
The preserved remains or traces of an organism that lived in the distant past
Term
strata
Definition
Horizontal layers of sediment
Term
crust
Definition
The thin outermost layer of the Earth
Term
lithosphere
Definition
The solid rocky layer of Earth formed by the crust and the upper part of the mantle
Term
mantle
Definition
The thicklayer of dense rock that sits beneth Earths crust
Term
sea-floor spreading
Definition
The pulling apart of plate boundries under the ocean floor
Term
tectonic plates
Definition
An irregular ssection of the lithosphere that floats on Earth mantle
Term
epicenter
Definition
A point on Earthssurface directly above the location of initial plate boundries
Term
focus
Definition
The location where earthquake movement first occures
Term
plate boundery
Definition
The edge of a tectonic plate
Term
seismic wave
Definition
A wave that carries the energy released when rock moves a plate boundries
Term
tsunami
Definition
A hige ocean wave usually caused by earthqakes under the ocean floor
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