Sunlight
Dead plants
Soil
Animals
Flow of energy from one organism to another in a food web
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
the place where animals live
unchanging, fragile systems that are easily damaged
only found in forests
a collection of organisms and materials that interact
Resilience
Boundaries
Scale
Food webs
Centimeter
Kilometer
All of the above
Meter