in three to five sentences explain the evidence that supports the idea that water on earth may have come from comets

Answer 1

One key piece of evidence supporting the idea that water on Earth may have come from comets is the similarity in the isotopic composition of water found on comets and Earth. The ratio of deuterium (a heavy isotope of hydrogen) to hydrogen in water on comets is similar to that found in Earth's oceans. Additionally, the discovery of organic molecules, such as amino acids, on comets provides further support, as these molecules are essential building blocks for life as we know it. Lastly, the detection of water vapor in the tails of comets as they approach the Sun suggests that comets contain significant amounts of water, which could have been delivered to Earth through impacts.