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