To organize the arguments for and against various theories about the source of Earth’s water, we can categorize them as follows:
Arguments For the Theory that Water Came from Objects in the Kuiper Belt:
- Spacecraft have confirmed that objects from the Kuiper Belt have Earth-like water. ✔️
- Others like it in the galaxy have water in their dust and gases. ✔️
Arguments Against the Theory that Water Came from Objects in the Kuiper Belt:
- Very little water is found on/in these objects. ✔️
Arguments For the Theory that Water Came from Objects in the Oort Cloud:
- Spacecraft have confirmed that objects from the Oort Cloud have non-Earth-like water. ✔️
Arguments Against the Theory that Water Came from Objects in the Oort Cloud:
- The sun could have evaporated the water over the billions of years since Earth’s formation. ✔️
This categorization helps in understanding the debates surrounding the origins of Earth's water.