World Geography
The planets with no natural satellites (reported so far) are

Jupiter and Saturn
Earth and Pluto
Mercury and Venus
Mars and Neptune

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World Geography
The modern theory of plate tectonics states

the convention currents within the earth's mantle cause the creation of new oceanic crust at the mid
the creation of oceanic crust and the drifting of continents
All of these
that the oceanic crust is destroyed at areas where this crust type becomes subducted under the light

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