Bringing all the evidence together Use what you have learned so far to connect observational evidence from today to an extremely dense and hot early universe that has expanded and cooled over time.

Evidence
Claim
Reasoning
Redshift in the spectra of galaxies
At the beginning of time, the universe was extremely small, hot, and dense but has been expanding ever since.
This evidence supports the claim because….

The detection of microwave background radiation all over the universe
At the beginning of time, the universe was extremely small, hot, and dense but has been expanding ever since.