Suppose That, as It Evaporates in the Upper Atmosphere, a Raindrop's

question 51

Multiple Choice

Suppose that, as it evaporates in the upper atmosphere, a raindrop's diameter changes in one minute from one millimeter to one micrometer. Its diameter has decreased by a factor of

• A) 10, i.e., it is one tenth of the initial size.
• B) 100, i.e., it is one hundredth of the initial size.
• C) 1,000 (or, 10³), i.e., it is one thousandth of the initial size.
• D) 1,000,000 (or, 10⁶), i.e., it is one millionth of the initial size.

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Definitions:

Dependent Variable

The variable in an experiment that is expected to change in response to manipulations of the independent variable.

Confound

A variable that influences both the dependent and independent variables in a study, potentially skewing results and making it difficult to determine causality.

Institutional Review Board

A committee that reviews and approves research protocols to ensure ethical standards are maintained in studies involving human participants.

Placebos

Inactive substances or treatments used as a control in experiments to test the effectiveness of medical interventions.