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