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Plate Tectonics test
STUDY!!!!!
19
Science
6th Grade
03/27/2012

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Cards

Term
two main types of evidence to learn about the Earths interior
Definition

Direct:rock samples

indirect:siesmic waves

Term
three main layers of the earth
Definition
crust mantle and core
Term
crust
Definition
thin layer of solid rock that includes both dry and the ocean floor
Term
mantle
Definition
is made up of rock that is very hot but solid
Term
core
Definition
is made mostly of the metals iron and mickel it consists of two parts a liquid outer core and a solid inner core
Term
three types of heat transfer
Definition
radiation conduction and convection
Term
what sets convection currents in motion
Definition
heating and cooling of fluids, changes in the fluids density, and the force of gravity
Term
convection currents
Definition
heat from the core and the mantle itself
Term
wegeners hypothesis
Definition
that all the continents had once been joined together in a single landmass and have since drifted apart.
Term
wegener got evidence from....
Definition
land features(puzzle pieces), fossils, and climate, glaciers
Term
wegener could not provide the evidence that....
Definition
explains the force that pushes or pulls the continents
Term
sea-floor spreading
Definition
the sea-floor spreads along both sides of the mid ocean ridge as new crust is added
Term
evidence that supported the theory of sea-floor spreading
Definition

eruptions

magnetic strips

the age

Term
ocean floor sinks back=
Definition
deep ocean trenches
Term
theory of plate tectonics explains 
Definition
the formation, movement and subduction
Term
three kinds of plate boundries and describe them
Definition

divergent- moves awayy from eachother

convergent- collides into eachother

transform- slides past(against) eachother

Term
where do volcanic belts form
Definition
along plate boundries
Term
how does a volcano form
Definition
forms above a hot spot when magma erupts through the crust and reaches the surface
Term
practice key terms
Definition
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