What Would Be the Main Factors Determining Whether Water Can

question 97

Multiple Choice

What would be the main factors determining whether water can exist in a liquid state on the surface of a planet?

• A) the presence of photosynthetic and highly intelligent life-forms
• B) the age and mass of the central star
• C) the atmospheric pressure and temperature on the planetary surface
• D) the color and temperature of the central star
• E) the existence of carbon-based biology

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