Author Question: On its icy surface, Uranus's satellite Ariel has smooth valleys with few craters. Other areas are ... (Read 78 times)

Destiiny22 · **on:** Jul 27, 2018

On its icy surface, Uranus's satellite Ariel has smooth valleys with few craters. Other areas are rough with many craters. Based on this, it can be concluded that

a. valleys are young and the rough areas are old.
b. the valleys are old and the rough areas are young.
c. both valleys and rough areas are young.
d. both valleys and rough areas are old.

Question 2

Uranus and Neptune appear blue or blue-green because

a. their atmospheres absorb blue light very efficiently.
b. their solid air-less surfaces are this color
c. their surfaces are covered with liquid water with no atmosphere
d. traces of methane in their atmospheres absorb red light very efficiently.