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