For questions 1 – 5, read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

          Saturn is easy to recognize thanks to its beautiful rings, which make it unique in our solar system. Despite being the second largest planet, Saturn is so light that it would float on water if a large enough body existed. Saturn is the sixth planet from the Sun and was the farthest known planet in ancient times.

          Saturn is a gas giant, like Jupiter, Uranus, and Neptune. It is made mostly of hydrogen and helium and has no solid surface. What looks like a surface in pictures are actually clouds. Its famous rings are thin, made mostly of ice and rocks, and extend up to 175,000 miles from the planet. Saturn also has more than 140 moons, with Titan being the largest. Titan is unique because it has a thick atmosphere and clouds, unlike any other moons in the solar system.

          A year on Saturn lasts about 29 Earth years, while a day is much shorter – just 11 Earth hours. People have observed Saturn for centuries, but it was first viewed through telescope in 1610 by Galileo. NASA has sent several spacecrafts to study Saturn, including Pioneer 11, Voyager 1 and 2, and Cassini. Cassini orbited Saturn for 13 years and even dropped a probe on Titan, making it the first spacecraft to land on a moon in the outer solar system.

                                                            (Adapted from: http://spaceplace.Nasa.gov/)