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Water on Earth

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Which of the following is the most widely supported hypothesis for the origin of Earth's water?

Water was formed through volcanic activity

Water was delivered to Earth by asteroids (correct)

Water was created through chemical reactions on Earth

Water was brought to Earth by comets

What evidence supports the hypothesis that asteroids are the source of Earth's water?

The ratio of hydrogen isotopes in meteorites matching that of Earth's oceans (correct)

The collision of large meteorites with Earth

The presence of water in asteroids

The cool temperatures on Earth's surface

How often do large meteorites collide with Earth?

Once every 10 million years

Once every 1 million years

Once every 20 million years (correct)

Once every 5 million years

Why was the water delivered by asteroids retained on Earth's surface?

<p>The water condensed into liquid due to cool temperatures</p> Signup and view all the answers

What is the age of the meteorites containing water that support the hypothesis of asteroid delivery?

<p>4.5 billion years old</p> Signup and view all the answers

Water on Earth

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Podcast

Questions and Answers

Which of the following is the most widely supported hypothesis for the origin of Earth's water?

What evidence supports the hypothesis that asteroids are the source of Earth's water?

How often do large meteorites collide with Earth?

Why was the water delivered by asteroids retained on Earth's surface?

What is the age of the meteorites containing water that support the hypothesis of asteroid delivery?

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