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