Unit 2.8- Energy Flow and Biogeochemical Cycles

Biogeochemical cycles recycle elements needed for energy flow and growth.

Energy flow and biogeochemical cycles are completely separate processes.

Energy flow recycles elements, while biogeochemical cycles do not.

Biogeochemical cycles only affect non-living things.

Energy moves from the sun to plants, then to animals, and is lost as heat at each step.

Energy is created by animals and moves to plants.

Energy flows from decomposers to the sun, then to plants.

Energy is only transferred between animals.

Carbon

Nitrogen

Phosphorus

Gold

Cutting down trees can disrupt natural cycles.

Using too much fertilizer can harm aquatic life.

Burning fossil fuels has no effect on cycles.

Excess nitrogen and phosphorus can hurt fish and plants.