Fill in the blank to complete the statement about the geologic time scale. On the geologic time scale, scientists use the terms era and period to describe lengths of time

Precambrian time.

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?