Feedback Loops and Carbon Cycle Concepts

The video introduces key concepts in ecology and environmental science, focusing on environmental systems, feedback loops, and biogeochemical cycles. It explains the difference between closed and open systems, describes ecosystems and ecotones, and discusses the role of feedback loops in stabilizing or destabilizing systems. The video also highlights the importance of indicator species in assessing ecosystem health and provides an overview of the hydrologic and carbon cycles.

What is a feedback loop in environmental systems?

• A type of ecosystem transition zone

• A method of measuring ecosystem health

• A process where a signal produces a response that influences the signal

• A cycle of nutrients through the environment

Which of the following is an example of a closed system?

• A test tube

• The atmosphere

• The ocean

• A forest

What are the three major systems of Earth?

• Lithosphere, atmosphere, and hydrosphere

• Ecosystem, biosphere, and lithosphere

• Hydrosphere, lithosphere, and biosphere

• Biosphere, hydrosphere, and atmosphere

In an ecosystem, what term describes non-living components?

• Ecotone

• Biotic

• Feedback

• Abiotic

What is an ecotone?

• A biogeochemical cycle

• A type of feedback loop

• A transition area between ecosystems

• A closed system

Which feedback loop is considered stabilizing?

• Runaway feedback

• Negative feedback

• Positive feedback

• Biogeochemical feedback

What is an example of a positive feedback loop?

• Predator-prey interactions

• Thermostat regulation

• Soil erosion

• Photosynthesis

What is the primary process that incorporates carbon into organic molecules?

• Evaporation

• Decomposition

• Photosynthesis

• Cellular respiration

How do decomposers contribute to the carbon cycle?

• By converting carbon dioxide into organic molecules

• By absorbing carbon dioxide from the atmosphere

• By producing oxygen

• By breaking down dead organisms and releasing carbon dioxide

What human activity is increasing carbon dioxide levels in the atmosphere?

• Transpiration

• Evaporation

• Burning fossil fuels

• Photosynthesis