WVGSA Grade 5 Science Practice Questions - West Virginia General Summative Assessment Grade 5 Science Exam

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A trout population in a mountain lake is tracked over 10 years: - Years 1–4: Population grows from 40 to 500 trout. - Years 5–10: Population levels off and fluctuates around 510 adult trout. Even when 800 extra trout fry hatch in Year 7, the adult population returns to ~510 by Year 8. What ecological factor limits adult trout numbers?

The lake reached its carrying capacity, determined by limited food, dissolved oxygen, nesting habitat, and space. Trout stopped reproducing after Year 4. Predators consumed 100% of all fish every winter. Lake water volume decreased by 95%.

Correct Answer:

The lake reached its carrying capacity, determined by limited food, dissolved oxygen, nesting habitat, and space.

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