Sunlight
Soil
Animals
Dead plants
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
Centimeter
All of the above
Meter
Scale
Resilience
Food webs
Boundaries
Conditions an animal needs to grow and reproduce
Flow of energy from one organism to another in a food web
Living and non-living things in an area and their interactions
Cycling of nitrogen between soil, water, and the atmosphere