While Studying the Impact of Nutrition on Intelligence, a Researcher

question 55

Multiple Choice

While studying the impact of nutrition on intelligence, a researcher has one group of rats on a vitamin-rich diet and the other group eating Big Macs. While observing the rats run a complicated maze, the researcher notes that the vitamin-enhanced rats' maze is more brightly lit than the Big Mac rats' maze. The difference in lighting in this study is a(n) _________.

• A) confound
• B) independent variable
• C) dependent variable
• D) hypothesis

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Definitions:

Vibration

A mechanical phenomenon whereby oscillations occur about an equilibrium point, commonly observed in objects that produce sound.

Molecules

Groups of atoms bonded together, representing the smallest fundamental units of a chemical compound that can take part in a chemical reaction.

Auditory Canal

Short tunnel that runs from the pinna to the eardrum.

Eardrum

A thin membrane that separates the outer ear from the middle ear and vibrates in response to sound waves, aiding in the process of hearing.