General Science - Physics (Basics)
Which of the following statements about particulate matter (PM2.5) pollution is CORRECT?
Which of the following statements about particulate matter (PM2.5) pollution is CORRECT?
hard Q10 of 15
Step-by-Step Solution
Step 1: Understand particulate matter sizes
PM2.5 refers to particles with diameter less than 2.5 micrometers, smaller than PM10.Step 2: Analyze health effects and sources
PM2.5 can penetrate deep into lungs and bloodstream causing respiratory and cardiovascular diseases. They come from combustion, vehicles, and industrial emissions, not only natural sources. PM2.5 is smaller than PM10, so it stays longer in air and is more harmful.Step 3: Why other options are incorrect
PM2.5 particles are harmful, not harmless. They do not settle quickly. They originate from both natural and human activities. PM2.5 particles are smaller, not larger, than PM10.Final Answer:
PM2.5 particles can penetrate deep into lungs causing respiratory and cardiovascular diseases → Option AQuick Check:
PM2.5 health impact = Deep lung penetration and diseases ✅
Quick Trick: Remember PM2.5 is smaller and more harmful than PM10.
Common Mistakes:
- Confusing PM2.5 with larger, less harmful particles or natural-only sources.
Master "Physics (Basics)" in General Science
Start learning the concept with an interactive lesson.
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore General Science Quizzes