answer: General Concepts1. Nutrient Cycle – The movement and exchange of nutrients in an ecosystem.2. Biogeochemical Cycle – A cycle that moves chemicals through biological, geological, and chemical processes.3. Matter Cycling – Matter is recycled within ecosystems, unlike energy.4. Ecosystem Balance – Nutrient cycles help maintain the stability of ecosystems.5. Decomposition – Breakdown of organic matter, key to nutrient recycling.6. Reservoir – A storage location for a nutrient (e.g., atmosphere, ocean, soil).7. Flux – The movement of a nutrient from one reservoir to another.8. Sink – A place where nutrients are absorbed and stored.9. Source – A place that releases nutrients into the cycle.10. Human Impact – Activities like pollution and deforestation disrupt nutrient cycles. Carbon Cycle Concepts11. Photosynthesis – Plants absorb CO₂ and convert it into glucose.12. Respiration – Organisms release CO₂ back into the atmosphere.13. Combustion – Burning of fossil fuels adds CO₂ to the atmosphere.14. Carbon Sequestration – Storage of carbon in forests or oceans.15. Ocean Uptake