The mean density of the moon is much less than that of the Earth (3.3 compared with 5.5), suggesting that the moon took away none of the Earth's heavy iron core, but that it is composed only of the granite and some of the basalt of the outer layers."
(The mean density of the moon; is; much less than that of the Earth) (it; is composed; only of the granite)
The mean density of the moon it
is is composed
much less than that of the Earth
only of the granite