Summary
Dragonfly larvae turn out to be a living water-quality test, and the SciGirls sample park streams to see what the insects say about pollution.
Viewer safety
Ages 7+
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Teaching resources
Discussion questions
Discussion
Full episode (28 min) from SciGirls, season 7.
- How can an insect tell you whether water is clean?
- What did the girls collect, and how did they count it?
- Why is a living indicator useful alongside a chemical test?
Quick work-a-long
Vocabulary: larvae, indicator species, water quality, sample.
Try it: Name two things that could pollute a stream near you. Write one way a community could stop each.