Mari spends time with Dr. Gilbert while he hypothesizes about the Earth's magnetism. Meanwhile, Waka and her brother search Mr. Hayase's lab for signs of Mari.
"Outer Core"
Cuando se hacen líquido, el hierro
y el níquel de la capa se mueve
NÚCLEO EXTERNO
Quando o ferro e o níquel liquefeitos
do núcleo externo se movem,