Clean Air

question 55

Multiple Choice

Clean air

• A) is pure oxygen.
• B) contains mostly oxygen, some nitrogen and nothing else.
• C) contains mostly nitrogen, some oxygen and nothing else.
• D) contains mostly nitrogen, some oxygen, and a very small amount of several other gases.
• E) has all of its nitrogen removed.

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Definitions:

Without Fear

Experiencing or acting in the absence of fear; having the courage or confidence to face situations directly.

Biological Involvement

The role biological factors play in influencing human behavior, traits, and health.

Gender Differences

Variabilities in characteristics, experiences, behaviors, and opportunities between males and females, stemming from biological, social, and cultural factors.

Androgen

A type of hormone that plays a role in male traits and reproductive activity; it includes hormones like testosterone.