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Earth Science
4 layers
10
Science
8th Grade
12/19/2011

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Term
Atmosphere
Definition
The gaseous portion of our planet; the planet's enviroment of air; one of the traditional subdivisions of Earths physical enviroment.
Term
Biosphere
Definition
all life on Earth;the parts of the solid Earth, hydrosphere, and atmosphere in which living organisms can be found.
Term
Geosphere
Definition
  • Layer of Earth under both the atmosphere and the oceans; it is composed of the core; mantle and crust.
Term
Hydrosphere
Definition
The water portion of Earth; one of the traditional subdivisions of Earths physical enviroment.
Term
Crust
Definition
The thin, rocky outer layer of Earth.
Term
Core
Definition
the intermost layer of Earth, located beneath the mantle; The core is divided into an outer core and an inner core. 
Term
Mantle
Definition
The 2890- Kilometer-thick layer of Earth located below the crust.
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