Praxis 5511 Practice Test Practice Question
Which of the following gases is beneficial in the upper atmosphere because it blocks ultraviolet (UV) radiation from reaching the ground but is harmful near ground level because it causes respiratory problems in humans?
Correct Answer: C
Rationale: Ozone (C) plays a crucial role in the upper atmosphere by forming a protective layer that absorbs harmful ultraviolet (UV) radiation, thereby shielding life on Earth. However, when ozone is present at ground level, it becomes a pollutant that can lead to respiratory issues and other health problems in humans.
Carbon monoxide (A) is a toxic gas that primarily affects the cardiovascular system rather than blocking UV radiation. Nitrogen (B) makes up a large portion of the atmosphere but does not absorb UV radiation and has no harmful effects at ground level. Radon (D) is a radioactive gas that poses health risks due to its radioactive properties but is not related to UV radiation absorption.
Unlock All Questions
Subscribe to Premium for full access to all practice questions, detailed rationales, and performance tracking.
Subscribe Now