Question

About how long ago was the earth formed?
A. 3 billion years ago.
B. 10 billion years ago.
C. 4.6 billion years ago
D. 20 billion years ago

Answer 1

It can be hard to say the timing of the earth’s formation as there is no rock remaining to estimate the age of the earth. Several scientists have established several theories for the formation of the earth. According to some researchers, it is believed that the series of collisions are responsible for the formation of the earth’. The first era within which the earth existed is the HadeanEon.

Complete answer: Near about 4.6 million years ago, the earth was formed. Hydrogen atoms and related nuclei were thrown by the cosmic explosion. Thrown hydrogen ions and the nuclei were then condensed which leads to the formation of nebulae. The gaseous structure that comprises the dust and various gasses, found in the space is called nebulae. Due to spinning, nebulae were separated from each other and formed a galaxy separately. Many stars are present in each of the galaxies. The origin of the earth occurred in one of these stars.
It is discovered that the solar system did not possess any stars or galaxies billions of years ago. There were only clouds, gasses, and dust that existed within the solar system. These dust, clouds, gases are condensed by the gravitational force due to the collision. Condensing of dust and other particles formed the solar nebula. Solar nebula was a large disk that spun continuously. Within the solar nebula, the earth was formed. It is the third planet of the solar system.
So, the correct answer is “Option C”.

Note: In the beginning, the earth was a molten liquid ball and the atmosphere of earth comprises only hydrogen and helium because these two gases were the two main components of the dusty solar nebula. At the origin, the earth possessed very hot weather.