Which statement is correct about the movement of plates that sit on top of the mantle?
A. They regularly move because of the convention currents of magma.
B. They regularly move because of convection currents of oceans
C. They never move because they are connected to mountains
D. They never move because they are connected to Earths crust
A. They regularly move because of the convention currents of magma.
The correct statement about the movement of plates that sit on top of the mantle is A. They regularly move because of the convention currents of magma.
To determine the correct statement about the movement of plates that sit on top of the mantle, we need to examine the information available.
The movement of tectonic plates is primarily caused by the convection currents in the mantle, which is the layer beneath the Earth's crust. These convection currents are the result of the heating and cooling of the mantle due to the transfer of heat from the Earth's core. This means that the correct answer is A. They regularly move because of the convection currents of magma.
Convection currents in the oceans, as mentioned in option B, are related to the movement of oceanic waters and not the movement of tectonic plates. The connection between plates and mountains, mentioned in option C, is not relevant to the movement of tectonic plates. Lastly, option D, stating that plates never move because they are connected to Earth's crust, is incorrect as tectonic plates are constantly shifting and altering in their positions over geological time.