Earth's biosphere modifies atmospheric gases by which action?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Prepare for your Introduction to Physical Geology Exam. Tackle diverse topics with multiple-choice questions and detailed explanations. Equip yourself with knowledge about Earth's physical processes and surface features. Ace your exam with confidence!

Multiple Choice

Earth's biosphere modifies atmospheric gases by which action?

Explanation:
Photosynthesis is the key process here. Plants, algae, and other photosynthesizing organisms take in carbon dioxide and water and, using light energy, convert them into sugars. As a byproduct, they release oxygen. This makes the biosphere a net sink for atmospheric CO2 and a net source of O2. So the best description is that the biosphere removes CO2 from the atmosphere and adds O2. While respiration and decay do release CO2 and consume O2, the overall effect of photosynthetic activity—especially in productive ecosystems and oceans—is to lower atmospheric CO2 and raise O2.

Photosynthesis is the key process here. Plants, algae, and other photosynthesizing organisms take in carbon dioxide and water and, using light energy, convert them into sugars. As a byproduct, they release oxygen. This makes the biosphere a net sink for atmospheric CO2 and a net source of O2.

So the best description is that the biosphere removes CO2 from the atmosphere and adds O2. While respiration and decay do release CO2 and consume O2, the overall effect of photosynthetic activity—especially in productive ecosystems and oceans—is to lower atmospheric CO2 and raise O2.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy