Question

Explain Big bang theory​

Answer 1

Answer:

The Big Bang theory is a cosmological model of the observable universe from the earliest known periods through its subsequent large-scale evolution

Answer 2

Answer:

The Big Bang theory was proposed to explain the origin of universe. According to this theory, the origin of universe took place due to a single huge explosion in the space due to which the various galaxies were formed in it.

Its various postulates were:

• The earth formed about 4.5 billion years back.
• There was no atmosphere on early earth.
• Water vapour, methane, carbon dioxide and ammonia were released from the molten mass which came  out of earth due to volcanic eruptions.
• The UV rays broke up water into Hydrogen and Oxygen.
• The ozone layer formed from oxygen slowly
• Water vapour condensed fell down as rain, to fill the depressions and form oceans.