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Science Flashcards for Vocab.
Book 1, Chapter 1, Sections 1,2, and 3
17
Science
8th Grade
08/22/2006

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Term
radiation
Definition
the transfer of energy through space.
Term
conduction
Definition
the transfer of heat within a material or between materials that are touching
Term
convection
Definition
the transfer of heat by movement of a fluid
Term
density
Definition
the amount of mass in a given space; mass per unit of volume
Term
convection current
Definition
the movement of a fluid caused by differences in temperature, that transfers heat from one part of the fluid to another
Term
continental drift
Definition
the hypothesis that the continents slowly move across earth's surface
Term
pangaea
Definition
the name of the single landmass that broke apart 200 million years ago and gave rise to today's continents
Term
fossil
Definition
a trace of an ancient organism that has been preserved in rock
Term
inner core
Definition
a dense sphere of solid iron and nickel at the center of the earth
Term
seismic waves
Definition
vibrations that travel through earth carrying the energy released during an earthquake
Term
pressure
Definition
the force exerted on a surface divided by the area over which the force is exerted
Term
crust
Definition
the layer of rock that forms around a volcano's central opening
Term
basalt
Definition
a dark, dense, ingenious rock with a fine texture, found in oceanic crust
Term
granite
Definition
a usually light-colored ingenius rock that is found in continental crust
Term
mantle
Definition
the layer of hot, solid material between earth's crust and core
Term
lithosphere
Definition
a rigid layer made up of the uppermost part of the mantle and the crust
Term
asthenosphere
Definition
the soft layer of the mantle on which the lithosphere floats
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