Carbon + Nitrogen Cycle Flashcards
(9 cards)
1
Q
What is the Carbon Cycle?
A
Movement of carbon between air, organisms, soil, and oceans.
2
Q
What removes CO₂ from the air?
A
Photosynthesis by green plants/algae.
3
Q
How is carbon added to the atmosphere?
A
Respiration, decomposition, combustion of wood/fossil fuels.
4
Q
What role do oceans play in the carbon cycle?
A
Absorb and store carbon dioxide.
5
Q
What disrupts the carbon cycle?
A
Burning fossil fuels & deforestation.
6
Q
What is the Nitrogen Cycle?
A
Movement of nitrogen through atmosphere, organisms, and soil.
7
Q
What is nitrogen fixation?
A
Bacteria in roots or soil turn N₂ into ammonium (NH₄⁺).
8
Q
What do nitrifying bacteria do?
A
Convert ammonium to nitrates (NO₃⁻) for plant use.
9
Q
What is denitrification?
A
Bacteria convert nitrates back to N₂ gas.
