When all students are connected by string to the web, have them shift until it is taut. Role play the following scenarios, having students first affected tug on the string. Everyone who feels the tug raises their free hand. Then these students tug on the string, and so on. A lawn care company's truck crashes near the wetland, spilling gallons of weed killer.
Rain washes chemicals into the wetland.
Ask students how the wetland web was affected by these scenarios. Brainstorm ways students can prevent the above scenarios. Have students find parts of the wetland web. Last updated June 24, 1998.