NGSS Science
So... how big is the Universe? It's big... really big... no, bigger than that... it's big. In this episode of Crash Course Kids, Sabrina gives us some perspective on this whole Universe thing and how we fit into it. NGSS 5-ESS2-1: Develop a model using an example to describe ways the geosphere, biosphere, hydrosphere, and/or atmosphere interact.

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