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What internal energy source is the most important in continuing to heat the terrestrial planets?
The 3 principal sources of internal heat of terrestrial planets are
Accretion, Differentiation, and Radioactivity
When we see a region of a planet that is not heavily cratered as other regions, we conclude that
the surface in the region is younger then the surfaces in more heavily cratered regions
How did lunar Maria form?
Large impacts fractured the moons lithosphere, allowing lava to fill the impact basins
How does seafloor crust differ from continental crust?
Seafloor crust is thinner, younger, and higher in density
Why are there fewer large craters on the seafloor then on the continents
the seafloor crust is younger then the continental crust
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