The world's largest library of math and science simulations.

“Chirp chirp chirp!” “Peep peep peep!” The singing of frogs is one of the signature sounds of spring. But what happens if you pass by a pond and you don’t hear a sound? If you are near a farm, there’s a chance the pond is polluted by agricultural runoff.



The GMOs and the Environment Gizmo allows students to explore the effects of GMOs, or genetically modified crops, on yields and the environment. The Gizmo focuses on two types of genetic modification, resistance to insects and resistance to herbicides. Some modifications cause plants to produce chemicals that are distasteful or even poisonous to insects, which reduces the need for pesticides. This can be very positive for local stream and pond ecology. Other crops are modified to be tolerant to specific herbicides. This allows fields to be sprayed with herbicides without harming crops, killing weeds, and allowing for higher yields.



With careful planning, students can use the Gizmo to model ways to utilize GMOs that allow for high yields while preserving ecosystems. This can lead to a nuanced classroom discussion of the costs and benefits of this technology.