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