TCA 2 Review Study Guide

Front

What is the significance of carbon dioxide concentration in the atmosphere?

Back

Carbon dioxide concentration is crucial for understanding climate change, as higher levels contribute to the greenhouse effect, leading to global warming.

Front

What are the characteristics of a climax community in an ecosystem?

Back

A climax community is a stable and mature ecological community that has reached a steady state, typically characterized by shade-tolerant trees and a diverse range of species.

Front

What is a positive feedback loop in environmental science?

Back

A positive feedback loop amplifies changes; for example, albedo causing ice melt leads to less ice, which decreases reflectivity and increases warming.

Front

Which biogeochemical cycle does NOT include the atmosphere?

Back

The phosphorus cycle does not include the atmosphere; it primarily involves soil, water, and living organisms.

Front

How do sea otters affect sea urchin populations?

Back

Sea otters regulate sea urchin populations by preying on them, which helps maintain the balance in marine ecosystems.

Front

What is the role of lichens in ecological succession?

Back

Lichens are pioneer species that help in soil formation and create conditions for other plants to grow during ecological succession.

Front

Define albedo and its environmental impact.

Back

Albedo is the measure of reflectivity of a surface; surfaces with high albedo reflect more sunlight, while low albedo surfaces absorb more heat, affecting climate.

Front

What is the hydrologic cycle?

Back

The hydrologic cycle describes the continuous movement of water on, above, and below the surface of the Earth, including processes like evaporation, condensation, and precipitation.

Front

Explain the carbon cycle and its importance.

Back

The carbon cycle is the process by which carbon is exchanged among the atmosphere, land, water, and living organisms; it is vital for regulating Earth's climate.

Front

What are the main components of the nitrogen cycle?

Back

The nitrogen cycle includes nitrogen fixation, nitrification, denitrification, and ammonification, which are essential for converting nitrogen into usable forms for organisms.