Sunlight
Soil
Animals
Dead plants
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
Living and non-living things in an area and their interactions
Kilometer
Meter
All of the above
Centimeter
Resilience
Boundaries
Scale
Food webs
unchanging, fragile systems that are easily damaged
a collection of organisms and materials that interact
the place where animals live
only found in forests