Final answer:
The Smithsonian Institution includes various museums, such as the National Air and Space Museum, the National Museum of Natural History, and the National Museum of American History.
Step-by-step explanation:
The term 'Splitsonian' does not exist in the context of Social Studies. It is possible that the term you meant to ask about is 'Smithsonian,' which is a renowned network of museums and research centers in the United States.
The Smithsonian Institution includes various museums, such as the National Air and Space Museum, the National Museum of Natural History, and the National Museum of American History.