Which is the oldest geological feature of Mercury?
a. smooth plains
b. jumbled terrain
c. intercrater plains
d. lobate scarps
e. rilles
Question 2
As a white dwarf ages, its position on a standard H-R diagram will move ____.
a. upward and to the right
b. upward and to the left
c. downward and to the right
d. straight downward
e. downward and to the left