Part 1 - Modeling the Big Bang with Balloons LabPart 2 - Evidence for the Big Bang (Intro to star spectra)Part 3 - Evidence for the Big Bang (Doppler effect and redshift)Part 4 - Evidence for the Big Bang (Cosmic Background Radiation)Part 5 - Claim, Evidence, ReasoningThis NGSS-aligned lesson bundle includes graphing and data analysis, hands on lab activities, videos, student modeling activities, spectroscopy and line spectrum analysis, scientific text analysis, and a claim, evidence, and reason