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Questions and Answers
Which of the following is the most widely supported hypothesis for the origin of Earth's water?
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?
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?
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?
Why was the water delivered by asteroids retained on Earth's surface?
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What is the age of the meteorites containing water that support the hypothesis of asteroid delivery?
What is the age of the meteorites containing water that support the hypothesis of asteroid delivery?
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