How much of the water on Earth do scientists think was delivered by comets?
A) none
B) a minor amount
C) a major amount
D) all of it

Name: How much of the water on Earth do scientists think was delivered by comets? A) none B) a minor amount C) a major amount D) all of it
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Question

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Scientists believe that comets contributed a minor amount of Earth's water. While comets did bring water to Earth, most of Earth's water is thought to have originated from other sources, such as volcanic outgassing.

How Much of the Water on Earth Do Scientists Think