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