accretion
Which of the following is not one of the four stages in the development of a terrestrial planet?
has a magnetic field
That Earth _______________ is evidence that Earth differentiated.
the pressure at the center raises the melting point.
The central regions of Earth's core are a solid because
S waves do not penetrate Earth's core.
Which of the following provide evidence that Earth's core is at least partially motlen?
molten metallic core.
Earth's magnetic field is generated by the dynamo effect in the
the midocean rifts.
The youngest parts of Earth's crust are
Earth's magnetic field
Which of the following is not produced by plate tectonics?
all of these
The oxygen in Earth's atmosphere
carbon dioxide is transparent to visible light and opaque to infrared radiation.
The greenhouse effect occurs because
aurora
The _______________ show(s) an emission spectrum and is caused by large electrical currents that flow into Earth's atmosphere near the north and south poles.
it has the properties of a solid but is capable of flowing under pressure.
Saying that Earth's mantle is plastic means that
carbon dioxide (CO2)
The gas that is most responsible for the greenhouse effect on Earth is
only b and c
Earth possesses few visible craters and the moon possesses many. This is because
a few centimeters per year.
The plates of Earth's lithosphere move at speeds of
The Appalachians are much older and have been smoothed by erosion.
The Himalayan mountains are rugged, jagged peaks and the Appalachians are smooth and rolling. Why is there a difference?
opaque to ultraviolet radiation.
The ozone layer is
flooding
In the development of a planet, the stage of _______________ occurred when molten rock flowed through fissures and filled deep basins with molten rock.
a and b
Slow surface evolution is caused by
sea level would rise and flood coastal areas.
If Earth's average surface temperature were to increase by several degrees,
convection from the hot interior.
The energy that moves the plates of Earth's crust comes from
composed of high energy particles from the solar wind that are trapped in Earth's magnetosphere.
The Van Allen belts are
none of the above
Why would a decrease in the density of the ozone layer create a public health concern?
true
The central part of Earth's core is solid.
true
Volcanism can occur in a midocean rift, above a hot spot in the mantle, or where one tectonic plate slides below another.
true
Earth's magnetic field has reversed itself.
true
The greenhouse effect occurs because carbon dioxide is opaque to infrared radiation.
true
The ozone layer is produced by oxygen atoms that link to form O3.