Cycling of nitrogen between soil, water, and the atmosphere
Living and non-living things in an area and their interactions
Flow of energy from one organism to another in a food web
Conditions an animal needs to grow and reproduce
All of the above
Meter
Centimeter
Kilometer
a collection of organisms and materials that interact
only found in forests
the place where animals live
unchanging, fragile systems that are easily damaged
Soil
Animals
Dead plants
Sunlight
Scale
Food webs
Boundaries
Resilience