Pluto's Density Is 1

Multiple Choice

Pluto's density is 1.8 g/cm³.Iron has a density of about 5 g/cm³.Rock (e.g.basalt) has a density of about 3 g/cm³.Ice and water have densities of 1.0 g/cm³.Which of the following can be deduced from those densities?

A) Pluto has a large iron-nickel core.
B) Pluto is about one-third water and two-thirds rocky material.
C) Pluto is solid rock all the way through.
D) Pluto is composed entirely of water or water ice.