Earth's layers formed as result of differentiation. During differentiation, different zones of elements form layers and today we
know these layers are made up of different elements. Certain elements sunk to the center while others collected near the surface. We might predict that the __________ elements, like iron and nickel, formed the core. A) heavier
B) least dense
C) light weight
D) first crystallized
An object is in motion if its distance from another object is changing. An object is in motion if it changes position relative to a reference point. An reference point is a place or object used for comparison to determine if something is moving.
