Weegy: Alfred Wegener is the scientist who first proposed the existence of Pangaea and Panthalassa. User: The Mid-Atlantic Oceanic Ridge is an example of a _____ boundary. Weegy: The Mid-Atlantic Oceanic Ridge is an example of a divergent boundary. User: he ultimate cause of plate movements is ___________. (More)

Weegy: Restless tectonic plates move (shift) between one and fifteen centimeters per YEAR. User: The seven continents used to be one huge supercontinent called _____. Weegy: The seven continents used to be one huge supercontinent called Pangaea. User: Earthquakes are especially associated with _____ boundaries. Weegy: Earthquakes are especially associated with transform boundaries. (More)

Weegy: The Earth's crustal plates move due to convection currents. (More)