Quiz

1. Why is Earth geologically active?
2. What processes shape Earth's surface?
3. How does Earth's atmosphere affect the planet?
4. Was there ever geological activity on the Moon or Mercury?
5. What geological features tell us that water once flowed on Mars?
6. Why did Mars change?
7. Is Venus geologically active?
8. Why is Venus so hot?
9. What unique features of Earth are important for life?
10. How is human activity changing our planet?