What substance makes up the core of large Jovian planets like Saturn?
A) Mercury
B) Hydrogen
C) Iron
D) Ice
Question 2
Which of the following processes created the lunar maria?
A) Solar winds eroded wide, shallow basins, which were later filled with ejecta.
B) Large impact craters were then filled with basaltic lava flows.
C) Liquid water flowed across the landscape, which later froze.
D) Rocks exposed to the solar winds oxidized.