Read the following statements and choose the following option: 1. The universe is very old – almost 20 billion years old. 2. The Big Bang Theory talks of a singular huge explosion unimaginable in physical terms. 3. In the solar system of the milky way galaxy, earth was supposed to have been formed about 4.5 billion years back. 4. Water vapour, methane, carbondioxide and ammonia released from molten mass covered the s

Step-by-step solution

The Big Bang theory attempts to explain to us the origin of universe. It talks of a singular huge explosion unimaginable in physical terms. The universe expanded and hence, the temperature came down. Hydrogen and Helium formed sometime later. The gases condensed under gravitation and formed the galaxies of the present day universe. In the solar system of the milky way galaxy, earth was supposed to have been formed about 4.5 billion years back. There was no atmosphere on early earth. Water vapour, methane, carbondio