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