Plate Techtronic Theory says The earth’s crust is splitting up into dozens of pieces called tectonic plates , which float on top of the mantle .Warned by the blazing hot core, the mantle churns in circular convection currents , dragging tectonic plates along for the ride.
Some continents look exactly like puzzle pieces that snap together . Early map makers suspect once they were all connected. In early 20th Century a scientist named Alfred Wegner called this super continent Pangea . He thought different chunks of it moves apart, to form like continents we know today.
That large continent Pangea starts breaking up, 200 Million years ago. Split of Pangea and Panthalassa resulted the formation of continents as of today.
Wegner couldn’t explain why Pangea split and how. It is because similar plants and rocks found the parts which get drifted. Ages and types of rock layers matched upto.
Continental drift have influenced the evolution . One of the most prominent example of effect of continental drift on evolution of organisms was the unique primates found in Australia and South Africa.
Rejected at first , by the scientific community Wegner’s theory of continental drift eventually was proved correct.
Today plate techtonic is the unifying theory of of the entire fields of geology. It explains the rock cycle , the origin of Earth’s surface featres , and the cause of seismic activity such as earthquakes and volcanoes.
When the earth was created more than 4000 million years ago, there was 54% oxygen and no carbon dioxide. When living organisms originated, they modified the early atmosphere of the earth.
From electromagnetic radiation to revolution of the earth everything is responsible for bringing dynamic changes on the surface of the earth and that changes made the earth as of the form we live now.
The early atmosphere largely contained water vapor, nitrogen, carbon dioxide, methane, ammonia and very little of free oxygen. The process through which the gases were outpoured from the interior is called degassing. Continuous volcanic eruptions contributed water vapor and gases.
The energy from earth, Geothermal energy is the heat received from the earth’s core, this heat continuously flows outwards. It transfers to the surrounding layers of the rock, the mantle. When temperature and pressure becomes very high some mantle rocks melt becoming magma.