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Ward's® Who's Killing Crystal Creek? Lab Activity

WARD470175-756 WARD470175-754
Solve the Mystery with Science

  • Test water samples and collect invertebrates
  • Linked to a real world scenario
  • Estimated class/lab time required: 120 - 160 minutes over 3 - 4 lab sessions.
People in the town of Crystal are being poisoned by the local creek. By swimming in the creek and eating fish from the creek, the town residents are getting sick and need to find the responsible party for this poisoning. Using role-playing, water chemistry, and image processing, your students will do the detective work to determine if there’s enough evidence to prosecute one of Crystal’s citizens for turning the creek into a potential killer. Students test for pH, nitrates, and turbidity to look for changes in the creek in response to various potential polluters. In addition, they will examine images of various invertebrates in order to identify and classify them according to their levels of pollution tolerance. This activity requires the use of a computer and three to four 40-minute class periods to complete. Includes materials for five setups.



Item # Description No. of Lab Groups Unit Availability Price Quantity
470175-756 Ward's® Who's Killing Crystal Creek Lab Activity
Hazardous Product
5 Each Retrieving Restricted
470175-754 Ward's® Who's Killing Crystal Creek Lab Activity, Refill Kit
Hazardous Product
5 Each Retrieving Restricted
restricted This product is marked as restricted and can only be purchased by approved Shipping Accounts. To apply for a shipping account number, click here. If you need further assistance, call Customer Service at 800-962-2660 or email


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