What Is the Most Abundant Gas in the Earth's Atmosphere

question 52

Multiple Choice

What is the most abundant gas in the Earth's atmosphere?

• A) CO₂
• B) O₂
• C) N₂
• D) CH₄

---

Definitions:

Epinephrine

A hormone and medication, also known as adrenaline, that increases heart rate, muscle strength, blood pressure, and sugar metabolism.

Norepinephrine

A neurotransmitter and hormone involved in the body’s fight or flight response, affecting blood pressure and heart rate.

Vital Signs

Basic measurements of the body's most important functions, including temperature, pulse, respiration rate, and blood pressure.

Situational Stress

Stress experienced in response to a specific situation or environmental demand that disrupts an individual's psychological equilibrium.