Across
- 4. is composed of iron, ____, and sulfur
- 6. is made of central iron core and ____ mantle
- 8. distance from the sun is ninety-three ____ miles
- 10. second planet from sun
- 12. close to the sun but really ___
- 13. surface is mainly _____
- 15. is both ___ and cold
Down
- 1. is composed of the crust, the mantle, and the ____
- 2. takes _____ hour to complete one rotation
- 3. takes ___ days around the sun one time
- 5. composed of oxygen,___,hydrogen,helium,and potassium
- 7. last inner planet
- 9. Mercury has ___ moons
- 11. planet from the sun
- 14. is the fastest planet traveling