Order these events from oldest (1) to most recent (4). Dense melted material sank to form the core. Earth's gravity captured gases to form the first atmosphere. Dust, rock, and ice were pulled together by gravity. Less dense material cooled, hardened, and formed the crust.

Dense melted material sank to form the core: 2

Earth's gravity captured gases to form the first atmosphere: 4

Dust, rock, and ice were pulled together by gravity: 1

Less dense material cooled, hardened, and formed the crust: 3

The events put into order of their occurrence are as below:

Dust, rock, and ice were pulled together by gravity Dense melted material sank to form the core Less dense material cooled, hardened, and formed the crust Earth's gravity captured gases to form the first atmosphere Explanation: Through the process of runaway accretion, the dust particles, rock, ice, and debris were pulled together owing to the inward whirling action of these materials. The heavy and dense material automatically sank to the center and formed the core. Due to the cooling of the surface layer by the rains that poured for millions of years, the material at the top hardened and formed the crust. Finally, the gravitational power of the completely formed Earth captured and held down the gases. This eventually formed an envelope of gases around the Earth known as atmosphere.