Studied by 44 people
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inner core
solid center of Earth, Iron and Nickel
outer core
liquid layer of Earth’s core
mantle
solid layer beneath crust, flows like oobleck
crust
rocky, least dense outside layer of Earth
seismic waves
evidence from earthquakes that support ideas about different layers inside Earth
density
evidence that supports idea that core is iron and nickel, increasing overall density of the Earth
magnetic field
evidence that Earth has metal inside, also protects us from solar radiation and makes compasses work
rocks
evidence of what crust is made of
Wegener
Guy who developed Theory of Continental Drift
Pangea
Giant supercontinent
Theory of Continental Drift
continents were once all one big landmass, then moved to their present locations over millions of years
convergent boundary
tectonic plates move toward each other
divergent boundary
tectonic plates move away from each other
transform boundary
tectonic plates slide past each other
continental crust
less dense crust, land
oceanic crust
more dense crust, under water
mountain
results from two convergent continental plates
mid-ocean ridge
where new crust forms from divergent oceanic plates
subduction
when oceanic crust gets pushed down and melted
rift valley
results from two divergent continental plates
earthquake
results from transform plates sliding past each other
volcano
landform resulting from convergent continental and oceanic crust. These occur in a line along the boundary of two plates
seismic waves
comet
icy rock that travels around the sun in space
crater
round indentation on land resulting from meteorite hitting planet
meteor
meteoriod
meteorite
island arc
