Chapter 2 Crossword

The action of living organisms such as bacteria breaking down dead organic matter into simpler substances.
Organisms that feed on plants and other organisms.
Organisms such as fungi and bacteria that change dead organisms into usable nutrients.
Models that show the flow of energy from plant to animal and from animal to animal.
A model that shows the loss of energy from one trophic level to another.
Models of a feeding relationship within an ecosystem.
Plants are called these because they create their own food.
The different steps of a food chain.
The process of plants and animals releasing carbon dioxide back into the atmosphere.
The process of returning nitrogen to the atmosphere.
The process of plants obtaining nitrogen from ammonium.
A chemical reaction in plants that converts solar energy into chemical energy.
The process of sediment being deposited.
Breaking Down rocks into smaller fragments.
The buildup of chemicals in a living organism.
The use of microorganisms or other forms of life to clean up the environment.
High-density metallic elements which are toxic to organisms at low concentrations.
A species that greatly affects the health of an ecosystem.
A way to measure chemical accumulation.
Synthetic chemicals the were used from 1930s to the 1970s.
important components of nutrient cycles in the biosphere