Planets

5. A large bowl-shaped hole on a planet's surface caused by impacts.
7. The movement of large sections of Earth's crust.
9. A gas found in the atmospheres of Uranus and Neptune that gives them their blue colour.
14. An invisible force around a planet that helps protect it from harmful radiation.
16. The Sun and all the objects that orbit it.
17. An ice giant that rotates on its side and appears blue-green because of methane.
18. The fourth planet from the Sun, known as the Red Planet because of its reddish colour.
19. Energy that travels through space in the form of waves or particles.
25. The four inner planets (Mercury, Venus, Earth, and Mars) that have solid, rocky surfaces.

1. The second-largest planet, best known for its spectacular ring system.
2. The smaller of Mars's two moons.
3. The third planet from the Sun and the only known planet that supports life.
4. The path a planet follows as it moves around the Sun.
6. The four outer planets (Jupiter, Saturn, Uranus, and Neptune) that are made mostly of gas and ice.
8. A large planet made mostly of gases and icy materials.
10. One of Mars's two small moons.
11. The largest planet in the Solar System, famous for its Great Red Spot storm.
12. A layer of gases surrounding a planet.
13. The second planet from the Sun and the hottest planet due to its thick carbon dioxide atmosphere.
15. A gas that makes up most of the atmospheres of Venus and Mars.
20. A natural object, such as a moon, that orbits a planet.
21. The farthest planet from the Sun, known for having the strongest winds in the Solar System.
22. Saturn's largest moon, which has a thick atmosphere.
23. The closest planet to the Sun and the smallest terrestrial planet with a rocky, cratered surface.
24. Neptune's largest moon.