Based on the analysis of the worksheet, I can now solve the problem by explaining how each change would affect countries on the Wilder River.
Scenario 1: Building a Dam in Northland
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Country Affected: Northland (and potentially other countries downstream)
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Help or Hurt?: HURT (for fish populations and countries dependent on them)
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Reason: The dam will block fish migration. Fish that live in the ocean need to swim upstream past the dam to reach Moore Lake to reproduce. With no way for fish to get upstream once the dam is built, fish populations will decline, which could hurt fishing industries and ecosystems in countries downstream.
Scenario 2: Water Diversion Canal between Southland and Northland
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Country Affected: Southland, Northland, and countries downstream
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Help or Hurt?: HELP for Northland (industrial water supply), HURT for downstream countries
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Reason: The canal will take half of the water from the Wilder River to supply Northland's industry center. While this helps Northland meet its industrial water needs, it reduces the water available for countries downstream, potentially affecting agriculture, drinking water supplies, and ecosystems.
Scenario 3: Removing Herbicide from Farmland
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Country Affected: Fairview (and potentially other countries along the river)
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Help or Hurt?: HURT for recreation, HELP for ecosystem
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Reason: People in Fairview enjoy boating on the Wilder River but dislike when seaweed grows in the river during weekends. Farmers have been spraying herbicide to control seaweed, but now they're stopping. This will likely lead to more seaweed growth, which could hurt recreational activities like boating. However, removing the herbicide is beneficial for the river's ecosystem by reducing chemical pollution.
In summary, each change has both positive and negative impacts depending on the perspective of different countries and stakeholders along the Wilder River. The dam helps generate electricity but harms fish migration, the canal helps industry but reduces water for downstream users, and removing herbicide helps the ecosystem but may reduce recreational enjoyment.
Parent Tip: Review the logic above to help your child master the concept of citizenship in the world worksheet answers.
