This lesson builds on ideas from the energy pyramid (check my products listing), and introduces the pyramid of numbers. This is an important concept in understanding the structure of an ecosystem, especially the importance of producers and top predators.
I have designed an activity that is included in the lesson to help students understand the process behind the pyramid of numbers. They are mice and each receive squares of "energy". The teacher chooses hawks from among the class. Each hawk needs a minimum number of squares of energy, and, hence, the population of hawks is limited by the population of mice, which is itself limited by producers.
To remove the "Wickline" watermark, select the Watermark from the Insert menu, then select No Watermark.
Science Education by Joshua Wickline is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 United States License