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