a collection of organisms and materials that interact
unchanging, fragile systems that are easily damaged
only found in forests
the place where animals live
Kilometer
All of the above
Centimeter
Meter
Sunlight
Animals
Soil
Dead plants
Resilience
Scale
Boundaries
Food webs
Cycling of nitrogen between soil, water, and the atmosphere
Living and non-living things in an area and their interactions
Flow of energy from one organism to another in a food web
Conditions an animal needs to grow and reproduce