Why Does a Planet's Size Matter When Predicting If It

question 49

Multiple Choice

Why does a planet's size matter when predicting if it can support life?

• A) Gravity will determine if a planet can retain an atmosphere.
• B) Large worlds are most likely to have life based on our own Solar System.
• C) Only very large worlds have atmospheres.
• D) Water only exists on very large planets.

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Definitions:

P-value

The probability of finding the observed, or more extreme, results when the null hypothesis of a study question is true.

Null Hypothesis

A hypothesis used in statistical testing that assumes there is no significant difference or effect, serving as the premise to be tested against the alternative hypothesis.

Null Hypothesis

A statement used in hypothesis testing that assumes there is no significant difference or effect and that any observation is due to chance.

Alternative Hypothesis

A theory that proposes there is a statistically significant relationship between two variables, contrasting the null hypothesis.