Final review · Put it all together
Reconstruct a defensible cosmic history
5 questions · About 8 minutes · Learn at your own pace
Your goalConnect spectral ratios, radiation scaling, nuclear counting, microwave signals, and candidate verification in five new cases.
Challenge points — / 100
10 per answer + 50 for completing the challenge0 of 5 answered correctly
Use what you learned across the course. Revisit a lesson whenever you need it; your answers will wait here. Retries never cost points.
1. Expansion evidence
10 points2. Thermal scaling
10 points3. Nuclear bookkeeping
10 points4. Background evidence
10 points5. Early-galaxy interpretation
10 pointsThe connections you made
Bring the whole story together.
Answer all 5 questions correctly to earn the 50-point completion bonus. Your correct answers are kept as you go.
Use Practice again to retry any completed question without changing your result.