Across
- 4. __________ has a mass that is 2 1/2 times greater than the mass of all the other planets and moons combined.
- 6. The fuzzy, gaseous component of a comet’s head
- 8. One year here lasts 88 Earth days and has no satellites
- 11. The huge gas giants—Jupiter, Saturn, Uranus, and Neptune
- 12. The largest satellite of Saturn
- 14. The Jovian planets have very thick __________ of hydrogen, helium, methane, and ammonia.
- 16. Planets that are small and rocky—Mercury, Venus, Earth, and Mars
- 18. One year here lasts 682 Earth days and has two satellites
- 21. A small, rocky body whose diameter can range from a few hundred kilometers to less than a kilometer
- 23. The ____________ ____________ _____________, is twice as wide as Earth with winds peaking at about 400 mph
- 24. One day here lasts 243 Earth days because the planet spins backwards
- 25. One year here last 248 Earth years
Down
- 1. Unlikely Saturn’s icy rings full of large icy and rock chunks, they are composed of small ____________ ____________.
- 2. ___________ is the most obvious difference between the terrestrial and Jovian planets.
- 3. Small, irregularly shaped bodies formed by colliding matter
- 5. The substances that make up the planets are divided into three groups: gases, rocks, and __________.
- 7. The luminous phenomenon observed when a meteoroid enters Earth’s atmosphere and burns up, popularly called a shooting star
- 8. A small, solid particle that travels through space
- 9. The planet that rotates on its sides
- 10. According to the nebular________, the sun and planets formed from a rotating disk of dust and gases.
- 13. One year here is 165 Earth years, and it has 14 satellites
- 15. One day here lasts 10 hours and 33 minutes on Earth, and one year here is 25 Earth years
- 17. Mercury has the greatest _____________ extremes of any planet.
- 19. Small bodies made of rocky and metallic pieces held together by frozen gases
- 20. Any portion of a meteoroid that reaches Earth’s surface
- 22. A cloud of gas and/or dust in space