On the basis of the data presented in the text, estimate the fractions of Earthâs volume represented by (a) the inner core, (b) the outer core, (c) the mantle, and (d) the crust.

The fractions of Earth's volume represented by the inner core is about 1%. The fractions of Earth's volume represented by the outer core is about 15%. The fractions of Earth's volume represented by the mantle is about 80%. The fractions of Earth's volume represented by the crust is about 1%.