Which of these are true??? o The earths outer layer, the crust, is split into large sections called plates.
o Convection currents are when heat rises (like a lava lamp) and this moves the plates.
o The earths continents used to be joined with each other like a jigsaw puzzle.
o The earths plates stopped moving 1.7 million years ago.
o The theory of plate movement is called plate tectonic theory.