When the planet was first created, it was a hot blob of matter. As it cooled, the density of the different elements separated. The heavier elements sank to the center to form the inner and outer core, and the lighter elements remained on the surface, forming the crust and mantle. Those layers were shaped to resemble a volcano. Here are some of the theories that explain the formation of the earth.
Scientists have long wondered how the Earth came to be. Some believe that the planets were created by chaotic forces or even godlike powers, but this theory is still up for debate. The three major theories are: disk instability, core accretion, and pebble accretion. According to the core accretion theory, the Earth’s crust formed from an S-poor source. The best candidate for such a source is the metal-rich CH chondrites, which were first classified in 1985. The CH chondrites are rich in metallic iron and contain water-bearing minerals.
Before the Moon was formed, the Earth had no atmosphere. At this time, the planet had a dense atmosphere and was like Venus. The lava that formed its crust cooled as it cooled and liquid water condensed to form the first ocean. This event caused the formation of the moon and is the origin of plate tectonics. The collisions and friction caused mountains and volcanoes. Those two processes essentially paved the way for the Earth’s modern geology.
Despite the complexity of the planet’s formation, scientists are convinced that the Earth was formed by collisions between planets that exploded and sank to the deepest layer. The Earth’s crust is made up of two layers, the core and the mantle. In the first layer, there are several oceans. These oceans drained away ocean water, which dries up and creates rivers. The second layer is the mantle.
The earliest stages of Earth’s formation were very intense. The planet was struck by an asteroid about 500 million years ago. The energy from these impacts melted the cosmic dust and formed a magma ocean. For millions of years, this ocean provided the necessary materials for life. However, during this period, no life was possible on earth, due to the enormous heat from the massive objects that bombarded the planet.
The early Earth’s surface looked very different from its present-day appearance. The planet was covered in a magma ocean that was melted by the sun’s intense energy during the collision. The water was present as water vapor in the atmosphere, and the sun was much more active than it is today. In the early stages of Earth’s formation, the planets remained in their current positions. The mantle was exposed to the radiation from the sun and other bodies.
In the first five billion years after the planet was formed, a dense atmosphere erupted. Hydrogen and water vapor in the atmosphere became trapped in this ocean and created a magma ocean that was active for millions of years. In this environment, the water was also heated, which resulted in volcanoes. It was possible that life on Earth had evolved at a later stage. If there had been, there wouldn’t have been any animals.
The formation of the planet Earth was a series of collisions. In the first five hundred million years, a dense atmosphere erupted from the Earth. As this process continued, the water vapor was released and formed oceans and clouds. As the oceans grew in size, salt was dissolved and was carried to the sea. By the time the Earth was formed, the mantle had reached its present shape.
Scientists also believe that the early Earth was a molten body that was impacted by numerous asteroid impacts. The resulting heat from the impacts created the Earth’s core. During this time, the Earth was covered in a dense magma ocean. The water then evaporated, and it was transformed into water vapor. Further, the sun was more active than it is today and blasted the entire solar system with UV radiation.