Module: Human Impact on the Environment
DCI: LS2.C (B) Moreover, anthropogenic changes (induced by human
activity) in the environment - including habitat destruction, pollution,
introduction of invasive species, overexploitation, and climate change - can
disrupt an ecosystem and threaten the survival of some species.
PE: HS-LS2-7 Design, evaluate, and refine a solution for reducing
the impacts of human activities on the environment and biodiversity.
[Clarification
Statement: Examples of human activities can include urbanization, building
dams, and dissemination of invasive species.]
The ideas in this standard are:
- human activities can cause changes in an ecosystem which disrupts the ecosystem and threaten the survival of some species.
- these changes may be caused by habitat destruction, pollution, introduction of invasive species, overexploitation, and climate change
It will be almost impossible to have kids design anything on a multiple choice test, but we can have them evaluate and possibly refine solutions. We can distinguish human/nonhuman, threatening/nonthreatening. Or, we can get specific about a threat and ask kids to tell us how it will impact an ecosystem.
Possible Question Starters:
"Only 200 miles of the 1213 mile long Columbia River are still free-flowing, after the construction of about 200 dams which have been constructed to provide water for electricity, irrigation, and flood control. The construction of these dams has destroyed salmon habitat, and disrupted the pathways of salmon as they move upstream to reproduce. Many scientists have suggested that the only way to save the salmon population is to rebuild these dams to allow for safer passage of salmon. Which of the following types of data would need to be collected in order to evaluate the effectiveness of this solution?"
correct answer - the number of salmon below the dam and above the dam during their migration period
incorrect answer - the average number of eggs laid by salmon during their mating season
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