Scientists have found that some comets contain a lot of water ice. When these comets travel close to the Earth, they can release this water. Chemical studies of water in some comets show it has a similar composition to Earth’s water. Additionally, models suggest that early Earth was bombarded by comets, which could have delivered water to our planet. This evidence supports the idea that comets may have contributed to the water we have on Earth today.
In three to five sentences, explain the evidence that supports the idea that water on Earth may have come from comets.
(use simple sentences please)
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