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science flash cards
5.1 and 5.2
18
Science
6th Grade
11/05/2013

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