Neptune is similar in composition to Uranus, and both have compositions that differ from those of the larger gas giants, Jupiter and Saturn. Like Jupiter and Saturn, Neptune's atmosphere is composed primarily of hydrogen and helium, along with traces of hydrocarbons and possibly nitrogen, but contains a higher proportion of "ices" such as water, ammonia, and methane. However, its interior, like that of Uranus, is primarily composed of ices and rock, and hence Uranus and Neptune are normally considered "ice giants" to emphasise this distinction. Traces of methane in the outermost regions in part account for the planet's blue appearance. COUNT 5
QSN1 Which planet is compositionally similar to Neptune?  ANS1 Uranus QSN2 What is Neptune's atmosphere primarily composed of?  ANS2 hydrogen and helium QSN3 What is the interior of Neptune composed of?  ANS3 ices and rock QSN4 What makes Neptune blue?  ANS4 methane QSN5 What "ices" makes up Neptune?  ANS5 water, ammonia, and methane