In age, Population I stars are typically much ________ than those of Population II.
Fill in the blank(s) with correct word
Question 2
The difference between the Grand Canyon and the Valles Marineris is:
A) the Grand Canyon was formed by water.
B) the Valles Marineris is much larger than the Grand Canyon.
C) the Valles Marineris has tectonic features surrounding it.
D) the Valles Marineris has craters in and around it.
E) All of the above.