Across
- 4. Sport played with a bat and wicket (7)
- 6. Outermost planet of the solar system (7)
- 7. German composer of the Fifth Symphony (9)
- 10. Largest planet in our solar system (7)
- 12. Mountain that can erupt with lava (7)
- 13. Ancient Egyptian royal tomb structure (7)
- 16. English playwright who wrote Hamlet (11)
- 18. Classic 26.2-mile running race (8)
- 20. World's largest hot desert (6)
Down
- 1. Most abundant gas in Earth's atmosphere (8)
- 2. World's highest mountain peak (7)
- 3. Scientist who proposed natural selection theory (6)
- 5. Capital city of Japan (5)
- 7. Capital city of Germany (6)
- 8. Element essential for human breathing (6)
- 9. Famous last pharaoh of ancient Egypt (9)
- 11. Spanish co-founder of Cubism (7)
- 14. South Africa's first Black president (7)
- 15. Electric car company founded by Elon Musk (5)
- 17. Particle of light (6)
- 19. Strong lightweight metallic element, symbol Ti (8)
- 21. Ocean between Europe and North America (8)