Across
- 5. In planets, the imaginary line about which the planet rotates.
- 6. The mixture of gasses surrounding a planet to protect it.
- 9. What is the core of Mars made of?
- 10. The length of a straight line through the middle of a planet.
- 11. The path that a planet goes around the sun.
- 12. The smaller moon of Mars.
- 14. What is the biggest planet in the inner solar system?
- 15. How many months does it take to travel to Mars in a rocket?
Down
- 1. What is the hottest temeperature on Mars in degrees celsius.
- 2. A natural satelite of a planet.
- 3. The surface of a stream, river, lake, ocean.
- 4. Air in natural motion, as that moving horizontally at any velocity along the earth's surface.
- 7. Mars's biggest moon.
- 8. An imaginary circle around the middle of a planet.
- 13. The Planet known as the red planet.