How do populations increase or decrease in size?

Creating math equations and explaining how population change.

High vs low carrying capacity within an ecosystem.

 Can you list the differences?

Oh Deer!

 Modeling how populations change based on amounts of bare necessities available and natural disasters.  Our Earth has natural ways of keeping ecosystems balanced.

Students were either deer or bare necessities.  If the deer found what they needed they were able to reproduce, if not they returned to being a bare necessity.