Răspuns: a) The Solar System was formed 4.6 billion years ago.
b)Many mountains were formed as a result of Earth's tectonic plates smashing together.
According to this theory, the ocean formed from the escape of water vapor and other gases from the molten rocks of the Earth to the atmosphere surrounding the cooling planet. ... As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence.
c)
Life on Earth was dominated by simple bacteria up until about 650 million years ago when more complex forms of life suddenly took over.
Good luck :)
