UNIDAD 1: VIAJANDO POR EL COSMOS A TRAVÉS DEL TIEMPO
UNIDAD 2: ROCAS Y MINERALES. LA GEOSFERA
UNIDAD 3: EL AGUA EN LA TIERRA. LA HIDROSFERA
UNIDAD 4: EL AIRE EN LA TIERRA: LA ATMÓSFERA
UNIDAD 5: LA VIDA EN LA TIERRA
UNIDAD 6: LOS ANIMALES INVERTEBRADOS
UNIDAD 7: LOS ANIMALES VERTEBRADOS
UNIDAD 8: EL MUNDO DE LAS PLANTAS
UNIDAD 9: EL MÉTODO CIENTÍFICO
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