Water Covers Approximately ________ of Earth's Surface

question 35

Multiple Choice

Water covers approximately ________ of Earth's surface.

• A)50 percent
• B)90 percent
• C)25 percent
• D)71 percent
• E)83 percent

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Definitions:

Independent Variable

The variable in an experiment that is manipulated or changed in order to test its effects on a dependent variable.

Dependent Variable

A variable in an experiment that is expected to change in response to changes in the independent variable.

Quasi-experimental

A research design that attempts to establish cause-and-effect relationships but lacks random assignment of participants to control or experimental groups.

Correlational Investigations

Research methods that explore the relationship or association between two or more variables without determining causality.