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Earth Science
geology
30
Science
8th Grade
03/12/2008

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Cards

Term
geologist
Definition
a scientist who studies the forces that make and shape the planet Earth
Term
rock
Definition
a material that forms the Earth's hard surface
Term
geology
Definition
the study of planet Earth
Term
constructive force
Definition
a force that builds up mountains and land masses on Earth's surface
Term
destructive force
Definition
a force that slowly wears away mountains and other features on Earth
Term
continent
Definition
a great landmass surrounded by oceans
Term
seismic waves
Definition
a vibration that travek theough the earth carrying the energy released durin an earthquake
Term
pressure
Definition
the amount of force psushing on a area
Term
crust
Definition
the layer of rock that forms the earths sureface
Term
basalt
Definition
igneous rock that forms the oceanic crust
Term
granite
Definition
a light coclr rock that forms the cotinental crust
Term
mantle
Definition
the layer of solid materail between the crust and core
Term
lithosphere
Definition
a ridge layer between the crust and manle
Term
asthensphere
Definition
a soft solid layer of the mantle
Term
outer core
Definition
layer of molten iron and nickle that surronds the inner core
Term
inner core
Definition
a dense sphere of iron and nickle at the center of the earth
Term
heat transfer
Definition
the movement of energy from a warmer object to a cooler object
Term
radiation
Definition
the transfer of energy through empty space
Term
conduction
Definition
the transfer of heat by direct contact
Term
convection
Definition
the transfer of heat by movement of a fluid
Term
density
Definition
mass/volume
Term
convection current
Definition
the movement of fluid caused by difference in temperature
Term
Pangaea
Definition
the single land mass that broke apart 200 million years ago
Term
continental drift
Definition
the hypothesis that the continents slowly move across the Earth's surface
Term
fossil
Definition
a trace of an ancient organism that has been preserved in rock
Term
mid ocean ridge
Definition
under sea mountain chain
Term
sonar
Definition
a devive that determs the depth of the ocean
Term
sea floor spreading
Definition
the process by which motlen rock is added to the sea floor
Term
deep ocean trench
Definition
a deep valley along the ocean floor
Term
subduction
Definition
the process by which the oceanic crust gose into the mantle
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