Tectonic plates

We saw two videos in the class of enviromental manegement and now we will resume that videos.

Plate Tectonics

Inside the earth there are convention currents that are currents of heat this causes tectonic plates (Which are in the litosphere) to move, expanding the crust in the subdaction movements one crust goes under another deep into the earth and heat cause rock to melts realising carbon dioxide and gas is returned back to the atmosphere 

The Early Earth and Plate Tectonics

The continents move towards and backwards each other until they form a very big continent named pangea.Then the continents separated again several times to formed the actual continents.that is called the continental drift theory. This happened because the tectonic plates moved so they also move the continents. The magma heated and went up and they cooled and went down again to heat again