When a Change in the Dependent Variable Could Be Due

question 58

Multiple Choice

When a change in the dependent variable could be due to an event beyond the researcher's control, _________ is a threat to internal validity.

• A)history
• B)maturation
• C)regression to the mean
• D)selection

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Definitions:

Continental Shelf

A submerged extension of a continent, ranging from the shoreline to a drop-off point known as the shelf break.

Hydrothermal Vents

Openings on the seafloor that emit hot, mineral-rich water, supporting unique ecosystems independent of sunlight.

Giant Worm Tubes

Large tubular structures created by certain species of marine worms, which serve as their protective habitats on the ocean floor.

H2S

hydrogen sulfide, a toxic, flammable gas with a characteristic odor of rotten eggs, found in many natural and man-made environments.