: Earth Half () 1: Photosynthesis (Love The Green Machines) () 2: What Makes A Sound? () 3: Everything's Made Of Atoms () 4: These Are The Elements () 5: Global Warming () 6: The Water Cycle () : Space Half () 7: The Speed Of Light () 8: Gravity () 9: Stars & Nebulae () 10: The Solar System () 11: Black Hole (Saggitarius A*) () 12: A Total Solar Eclipse ()