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