AP Environmental Scienceeasymcq1 pt
Burning fossil fuels affects the carbon cycle by
A.releasing carbon stored for millions of years as CO₂
B.removing CO₂ from the atmosphere
C.creating new carbon atoms
D.speeding up photosynthesis globally
Explanation
Core Concept
Combustion oxidizes ancient carbon in decades, overwhelming the sinks that once balanced the cycle — the driver of rising atmospheric CO₂.
Correct Answer
Areleasing carbon stored for millions of years as CO₂
More Unit 1: The Living World: Ecosystems practice questions
- hardDetritivores differ from decomposers because detritivores
- easyWhich practice increases the carbon stored in an ecosystem?
- easyHumans are best classified in most food webs as
- easyWhich organism is an autotroph?
- hardIn a grassland food web, removing all decomposers would first cause
Practice more AP Environmental Science questions with full explanations
Practice Unit 1: The Living World: Ecosystems Questions →