Suppose an astronomer discovers a large, spherical-shaped body orbiting the sun. The body is composed mostly of rock, and there are no bodies sharing its orbit.

The body discovered is Planet

Explanation:

A planet is an astronomical body orbiting a star (sun) usually rocky like in nature that is massive enough to be rounded by its own gravity.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.