A Researcher Tries to Make Sure That Subjects in the Experimental

question 131

Multiple Choice

A researcher tries to make sure that subjects in the experimental and control groups are very similar to each other in order to reduce the effects of

• A) extraneous variables.
• B) random variables.
• C) dependent variables.
• D) independent variables.

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Definitions:

Abyssal

Pertaining to the deepest parts of the ocean, typically depths beyond 2,000 meters, characterized by high pressures, low temperatures, and complete darkness.

Periwinkles

Small marine snails found in the intertidal zones of shores, known for their distinctive shape and role in aquatic ecosystems.

Oceanic Zone

The region of the open sea beyond the edge of the continental shelf, characterized by its vast expanse, deep waters, and diverse marine life.

Mesopelagic Zone

A layer of the ocean between 200 and 1,000 meters deep, characterized by dim light, also referred to as the twilight zone, and known for its unique marine life adaptations.