"The heat in the mantle causes movements of matter, what we call convection currents," explains David Bercovici. The hot material rises to the surface where it cools down and then descends. "

We can also read that “The Earth takes a year or 365.242 days to orbit or revolve around the Sun. At the same time, it rotates on its axis (the imaginary line that connects the North Pole to the South

Hi to all members of the Hive community I introduce myself My name is Andria Bella, I was born in france, Iam a Geologist.