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New ocean-floor is constantly being produced through the process known as
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
The difference between oceanic and continental crust are
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
An important warning sign of volcanic activity
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
The Earth's magnetic field results from movement in the
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
What formed when the uppermost portion of the Earth's mantle cooled?
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
The geological time scale is a record of
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
The gradual development of new organisms from preexisting organisms is called?
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
When two continental plates diverge
sea - floor spreading
Earth's Crust
the life forms and geological events in Earth's history
a rift valley forms
is a bulge in the surface of the volcano
evolution
outer core
oceanic crust is younger and more dense
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