The Moon Probably Formed

question 24

Multiple Choice

The Moon probably formed:

• A) out of a collision between Earth and a Mars-sized object.
• B) when the Earth's gravity captured a planetesimal.
• C) when the accretion disk around Earth fragmented.
• D) when planetesimals collided to form a more massive object.

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Definitions:

Sampling Frame

A list or database from which a sample is drawn for a statistical survey, representing the population of interest.

Probability Sample

In a probability sample, the units have a known and nonzero chance of being selected.

Representative Sample

A subset of a population that accurately reflects the members of the entire population.

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Surveys or questionnaires that individuals complete on their own without interviewer guidance or interference.