Use Figure 7.12 to compare the accretional energy per kg for the Earth and for Mars. What...

Use Figure 7.12 to compare the accretional energy per kg for the Earth and for Mars. What implications might this comparison have for the early histories of the Earth and Mars?

FIGURE 7.12 The Amount of Accretional Energy Per Kilogram Produced During Formation for the Moon and Five of the Planets The accretional energy per kilogram is shown relative to the accretional energy per kilogram for the case of the Earth. The amount of energy per kilogram increases with the mass of the planet or satellite. This is an example of a graph using logarithmic scales to show several powers of ten in a single graph. (For more information about using logarithmic graphs, see Appendix 16.)