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