Compléter Activity 3Version en ligne Completa el texto con base al texto científico par My Project 1 nucleus system smaller solar earth structure composed planet which superficial mayor Earth million lower Earth Sun third layers The volume of the is more than a times than the , is the from the Sun . It is the of the four terrestrial planets of our The of the is of . The most is the bark . The second is the mantle , is divided into the upper and lower mantle , and the last and deepest is the , which is divided into the upper and nucleus .