II)-Fill in each blank of the passage with the correct word from the box.
ocean | life | clouds | system |
difference | conditions | kind | atmosphere |
Can there be Life in the Environment of Titan?
Titan is Saturn’s largest moon and the second largest in the solar (1) ____________ (after Ganymede of Jupiter). It is the only moon in the solar system with clouds and a dense, planet-like (2) _____________. Scientists believe that (3) _________on Titan are similar to Earth's early years. The main (4) ___________is that, because it is closer to the sun, Earth has always been warmer. Titan's atmosphere is very cold, from -200 degrees to -179 degrees Celsius!
In the atmosphere there are layers of (5) ___________composed of complex molecules such as methane. There also may be an (6) ____________of methane, or perhaps a liquid water layer inside the moon. This type of environment, except for the cold, is the (7) ___________of environment in which scientists think (8) __________began.