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