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