Select the ways in which Titan resembles early Earth. Choose one or more:

A. Its atmosphere is mostly nitrogen.

B. It has a thick atmosphere.

C. It is rich in organic compounds.

D. It has terrain similar to Earth's.

E. It has liquid water on the surface.

Answers A), B) and D) are correct.

Explanation:

The Saturn moon Titan is considered to be similar to Earth in certain aspects. As only moon or planet of the solar system besides Earth, the atmosphere of Titan is a thick layer with clouds and consists mostly of nitrogen. It was discovered that the terrain looks similar to some parts of Earth. On Titan, there can be found organic compounds but not in large amounts and there is no liquid water on the surface, although there is a high probability for the existence of an underground ocean.