3. what are the two prevailing theories about the origin of water on earth?

3. what are the two prevailing theories about the origin of water on earth?

3. what are the two prevailing theories about the origin of water on earth?

Answer

Brief Explanations:

The two main theories are that water was delivered by comets and asteroids (exogenous delivery), and that water was present in the materials that formed the Earth (endogenous origin).

Answer:

  1. Exogenous delivery (by comets and asteroids).
  2. Endogenous origin (present in Earth - forming materials).