Establish Prior Knowledge
Call on volunteers to describe light pollution. Tell them that in the Bio Snapshot they are about to see, scientists explain some of the dire consequences of light pollution.
Have students view the snapshot and read the synopsis. Use the following questions to guide discussion.
1. City lights on the world map showed how bright our human presence is at night. Which areas had the most light?
2. Give examples of how human-made light can attract or repel animals, and interfere with their navigation, reproduction, and health.
3. How do lights reflecting off of shiny artificial surfaces interfere with animals?
4. How do you think a significant loss of insects would affect the world’s food web?
Discuss with students ways to lessen light pollution in their area.
Direct students who want to learn more to these websites: