Question

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.

Answer 1

Answer:

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.

Answer 2

The formation of Earth in order of how it happened was:

1. Dust, rock, and ice were pulled together by gravity.
2. Dense melted material sank to form the core.
3. Less dense material cooled, hardened, and formed the crust.
4. Earth’s gravity captured gases to form the first atmosphere.

Owing to gravity, various materials in space such as dust, rock and ice, were pulled together.

The heavier and denser materials had no choice but to sink and because of the pressure exerted on them by material on top of them, they became the Earth's core.

The lighter and less dense material was then able to harden and become the crust. The gravity of the Earth then attracted various gases such as hydrogen and helium to create Earth's atmosphere.

In conclusion, Earth as it is now, was the result of several steps that made it what it is today.

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