what is the big bang theory?
Answers
Mark it as braily plz
the universe was condensed in a infinitely small and infinitely dense space and then something happened and it exploded creating mass this is big bang
We all look up into the sky, and what we see is thousands of stars, galaxies, planets etc,, and this all when merge together form UNIVERSE... of which earth is just a tiny part.
By the Big Bang Theory we came to know about the existence of earth.
Earth is about 4.6 billion years old.
As per the THE BIG BANG THEORY :
1) There was a huge thermonuclear explosion which was unimaginable and leads to the existence of Universe.
2) When the universe expand various galaxies were formed , Our Milky way galaxy is one of them.
3) The spherical gaseous clouds pf cosmic dust (present there) collapsed into a rotating flattened disc.
4) It has been said the sun and the other planets were formed by this spherical clouds of gases and cosmic dust by rotation and gravitation with time the smaller clouds condenses to form planets.
5) Earth was also formed with other planets
TALKING ABOUT EARTH :
1) Earth was considered to be gaseous state. It was molten fire ball and took millions of years to cool and its matter to condense.
2) After cooling it consist of three phase :
a) solid phase : lithosphere
b) liquid phase : hydrosphere
c) gaseous - the atmosphere.
3) There was continous volcanic eruptions on earth which results giving out molten rocks and the formation of continents.
4) Steam (water vapour) was given out by volcanoes which results in rain storms that made ocean rivers and lake on earth.
5) The earth's atmosphere was formed by volcanic gases like hydrogen , nitrogen , water vapour and carbon dioxide. The earth's atmosphere is termed to be REDUCING which mean it is not consist of free oxygen.
6) The interactions of volcanic gases leads to the formation of water, ammonia , methane, HCN.
EXISTENCE OF FIRST ORGANISM ON EARTH :
1) The atmosphere was of reducing type , it was been assumed that the first organism existed have been able to live without oxygen.
2) Again it was assumed,cyanobacteria (singled celled organism) was came first into existence on earth ..