Among rocky (terrestrial) planets with broadly similar silicate mantle compositions, a higher observed bulk density is generally taken as an indicator of a proportionally larger, denser metallic (iron-rich) core relative to the planet's silicate mantle and crust.
Comparing the given bulk densities — Venus (5.25 g/cm³), Mars (3.94 g/cm³), Earth (5.52 g/cm³), and Mercury (5.44 g/cm³) — Earth has the highest bulk...
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