During which stage of planetary development did the lunar maria form?
a. cratering
b. differentiation
c. flooding
d. tectonic plate movement
e. slow surface evolution
Question 2
During the Sun's main-sequence lifetime, ____.
a. the solar wind will remove about 50 of the Sun's total mass
b. the solar wind will remove about 10 of the Sun's total mass
c. the solar wind will remove 1-2 of the Sun's total mass
d. the solar wind will remove a tiny fraction of the Sun's total mass
e. mass loss from the solar wind will be balanced by material falling onto the surface from the corona