How is Titan, the moon of Saturn, similar to the Earth?
A) like the Earth, Titan has an atmosphere made mostly of molecular nitrogen
B) Titan, like the Earth, has an internal magnetic field
C) like the Earth, Titan has oceans of liquid water on its surface
D) Titan is almost the same size as the Earth
Question 2
A pattern of dark lines on a continuous background is referred to as
A) an emission line spectrum
B) an absorption line spectrum
C) a continuous spectrum
D) a dark spectrum