Celestial Profiles 2

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Across
  1. 2. Jupiter's "Ocean Moon"
  2. 4. These types of currents move the plates around the surface of Earth and are caused by the churning liquid rock in the mantle
  3. 5. On Venus it rains ___ acid
  4. 6. Saturn's largest moon, slightly smaller than Mars and larger than Mercury!
  5. 8. The largest of Jupiter's Moons
  6. 10. Saturn's moon that has been found to have the building blocks of life in it
  7. 13. Mars is the fourth and final ____ planet from the Sun
  8. 18. On Uranus, it is theorized that it rains _____ on its upper mantle due to its immense pressure
  9. 19. Named after the Roman god of the Sea and was the first discovered by purely mathematical means
  10. 20. Comparative _____ is the act of comparing and contrasting different planets to Earth
  11. 21. The remnants from a radioactive element decaying
  12. 23. The closest plane to the Sun
  13. 25. This -238 element has a half life of 4.5 billion years
  14. 26. These missions, undertaken by President John F Kennedy, led to landing a human on the Moon for the first time
Down
  1. 1. Named after the Roman king of the Gods and the first Jovian planet
  2. 3. Important parts of Earth's development that are caused by convection currents - they bring magma to the surface of the Earth
  3. 7. The planet named after the Roman goddess of love with a surface temperature of above 470C
  4. 9. The solar system is at least 4.6 ____ years old
  5. 11. The low density surface of a planet
  6. 12. Named after the Greek god of the sky and the first planet "discovered" since it cannot be seen with the naked eye
  7. 13. The moon is said to be ____ coupled, which means as it revolves around the Earth, it rotates just enough so we only see one face of the Moon
  8. 14. The most accurate way to find the age of a celestial body is by looking at the elements and work from there - this is called ______ dating
  9. 15. The amount of material that decays after one half life
  10. 16. The largest volcano in the solar system, located on Mars
  11. 17. This planet is named after the Roman god of War
  12. 20. As you get closer to the core of the Earth, the temperature and ____ increase drastically
  13. 22. The part that lies between the crust and the core with deep layers of molten rock
  14. 24. mercury is named after the ___ messenger god due to its speed moving across the night sky