Origins of Earth's Water

What makes Earth unique among rocky planets in our solar system?

• It has a solid iron core.

• It has the largest moon.

• It has a thick atmosphere.

• It has a significant amount of water.

According to one hypothesis, how was water released from Earth's interior?

• Via tectonic plate movements.

• By melting glaciers.

• Through volcanic eruptions.

• Through atmospheric condensation.

What challenge does the isotope ratio present to the hypothesis of water from celestial impacts?

• The ratio does not match Earth's current water.

• The isotopes are unstable.

• The isotopes are too light.

• The isotopes are too heavy.

How might solar wind have contributed to Earth's water supply?

• By melting ice on comets.

• By irradiating dust with protons to create water.

• By altering Earth's magnetic field.

• By carrying water molecules directly.

What recent evidence supports the idea of water being present on other rocky planets?

• Observing liquid water on Jupiter's moons.

• Finding ice on Mercury's poles.

• Detection of water vapor in Venus's atmosphere.

• Discovery of water on Mars from its beginning.