This is a basic model that shows population over time. Population is a stock, fed by a birth flow. The birth flow represents change in population due to reproduction. Birth rate is a term that feeds into the birth flow.
Nova Online: Simple Population Model (opens in new tab)
Running this model:
1. Click on the “Capture” button in the tool bar.
2. Click “Load” next to “Capture.”
3. Click “Exec” to run the model through multiple iterations. Click “Stop” to stop the graph.
4. To run the model step by step, click “Capture,” “Load,” “Init,” then “Step.”