Rank the following 4 items in order of increasing density (low to high).
A) black hole singularity, main-sequence star, white dwarf, neutron star
B) main-sequence star, neutron star, white dwarf, black hole singularity
C) main-sequence star, white dwarf, neutron star, black hole singularity
D) main-sequence star, black hole singularity, neutron star, white dwarf
Question 2
Which of the following best describes the composition of the particles forming Saturn's rings?
A) methane ice
B) hydrogen and helium
C) water ice
D) metallic grains
E) volcanic rock