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