Sunlight
Soil
Dead plants
Animals
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
Living and non-living things in an area and their interactions
Food webs
Boundaries
Resilience
Scale
the place where animals live
a collection of organisms and materials that interact
unchanging, fragile systems that are easily damaged
only found in forests
All of the above
Meter
Centimeter
Kilometer