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
Cycling of nitrogen between soil, water, and the atmosphere
Boundaries
Resilience
Food webs
Scale
the place where animals live
unchanging, fragile systems that are easily damaged
only found in forests
a collection of organisms and materials that interact
Soil
Sunlight
Animals
Dead plants
Kilometer
Meter
Centimeter
All of the above