Front

Trophic Levels

Back

Hierarchical levels in an ecosystem, each representing a step in the food chain.

Front

10 Percent Rule

Back

Only 10% of energy is transferred to the next trophic level.

Front

Carbon Cycle

Back

Movement of carbon through the atmosphere, biosphere, hydrosphere, and geosphere.

Front

Nitrogen Cycle

Back

Process of nitrogen moving between the atmosphere, soil, and organisms.

Front

Phosphorus Cycle

Back

Movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

Front

Ecological Succession

Back

Gradual process of change and replacement in a community.

Front

Primary Succession

Back

Succession that begins in lifeless areas.

Front

Secondary Succession

Back

Succession in areas where a community has previously existed.

Front

Energy Flow

Back

Movement of energy through trophic levels.

Front

Photosynthesis in Carbon Cycle

Back

Converts CO2 into organic matter.