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Earth's Structure Ch 1
Interactive Science Series
27
Science
6th Grade
03/29/2016

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Term
system
Definition
a group of parts that work together as a whole
Term
energy
Definition
the ability to do work
Term
atmosphere
Definition
relatively thin envelop of gases that forms Earth's outermost layer
Term
geosphere
Definition
has 3 main parts: a metal core, a solid middle layer, and a rocky outer layer
Term
hydrosphere
Definition
contains all of Earth's water
Term
biosphere
Definition
the part of Earth that contains living organisms
Term
constructive forces
Definition
shape the land's surface by building up mountains and other landmasses
Term
destructive forces
Definition
destroy and wear away landmasses through processes like erosion and weathering
Term
seismic waves
Definition
an indirect way to study Earth's interior; the result of earthquakes
Term
pressure
Definition
results from a force pressing on an area
Term
crust
Definition
layer of rock that forms Earth's outer skin
Term
continental crust
Definition
the crust that forms the continents
Term
oceanic crust
Definition
the crust that lies beneath the ocean
Term
basalt
Definition
dark, fine grained rock; the composition of oceanic crust is similar to this
Term
granite
Definition
a rock that usually is a light color and has course grains; the composition of the continental crust is similar to this
Term
mantle
Definition
a layer of hot rock
Term
lithosphere
Definition
the crust and uppermost mantle grouped together
Term
asthenosphere
Definition
a soft layer of rock that is still solid
Term
mesosphere
Definition
this is part of the lower mantle; hot but rigid rock
Term
core
Definition
made of mostly iron and nickel; consists of a liquid outer core and a solid inner core
Term
outer core
Definition
layer of molten metal surrounding the inner core
Term
inner core
Definition
a dense ball of solid metal
Term
radiation
Definition
the transfer of energy that is carried in rays like light; carried through empty space
Term
conduction
Definition
heat transfer between materials that are touching
Term
convection
Definition
heat transfer by the movement of fluid
Term
density
Definition
a measure of how much mass is contained in a given volume of a substance
Term
convection current
Definition
the flow that transfers heat within a fluid
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