Final review · Put it all together
Protecting worlds and protecting Earth challenge
5 questions · About 8 minutes · Learn at your own pace
Your goalApply the course to five new situations. Use the readings and explain which evidence supports your decisions.
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. Forward and backward contamination
10 points2. Preserving scientific sites
10 points3. Orbit prediction and impact probability
10 points4. Planetary-defense mission concepts
10 points5. International coordination and public communication
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.