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