Middle School Science - Performance Task - The Clearwater River Ecosystem Investigation
6 Questions
Analyze the data table provided.
Scientists are concerned that fertilizer runoff from lawns in the new housing development is causing algal blooms.
To help salmon migrate past a new road crossing, engineers must install a culvert (a large pipe under the road). They are considering the designs below.
The graph below shows the human population growth in the town next to the Clearwater River and the corresponding number of spawning salmon counted each year.
A local environmental group wants to propose solutions to help the salmon. Read each proposed idea below.
Based on the initial investigation, the environmental group implemented two solutions in 2025 to restore the Clearwater River.
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