Which Principle of Heat Exchange Is the Most Important Explanation

question 39

Multiple Choice

Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluff their feathers?

• A) Fluffing feathers results in less cooling by radiation because feathers emit less infrared radiation than other tissues do.
• B) Fluffing decreases the amount of heat lost by conduction when the bird makes contact with cold objects in its environment.
• C) Fluffing creates a pocket of air near the bird that acts as insulation.
• D) Fluffing decreases the surface-area-to-volume ratio, thus decreasing the amount of heat lost to the environment.

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Definitions:

Ethnic Identity

A person's sense of belonging to a particular ethnic group, incorporating cultural traditions, language, and feelings of kinship.

Ego Identity

A sense of self that develops through social interaction, as proposed by Erik Erikson, playing a crucial role in one's feelings of continuity and sameness across time.

Personality

A mixture of feelings, attitudes, and patterns of action that characterizes a person.

Environmental Approach

A method or strategy that focuses on altering the physical or social environment to influence behavior, rather than changing the behavior itself.