In three sentences, describe how scientists use deductive and inductive reasoning to support the idea that water on Earth may have come from comets.(4 points)
Scientists use inductive reasoning to observe that comets contain water and other volatile compounds. They then use deductive reasoning to conclude that if comets contain water, and Earth's water is similar to comets, it is likely that Earth's water came from comets. This is supported by the discovery of isotopic similarities between Earth's water and comets.
