Why is Jupiter denser than Saturn?
A) The extra mass of Jupiter compresses its interior to a greater extent than that of Saturn.
B) It is made of a different composition than Saturn, including a higher proportion of hydrogen compounds and rocks.
C) Its core is much larger than Saturn's.
D) It has a greater proportion of helium to hydrogen compared to Saturn.
E) Scientists do not know why this is so.
Question 2
The NEAR spacecraft actually landed on the asteroid ________ in February 2001.
A) Itokawa B) Vesta C) Eros D) Ida E) Ceres