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

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Engineers evaluate two agricultural watershed protection plans: - Plan A: Construct concrete drainage channels to move agricultural runoff directly into rivers as quickly as possible. - Plan B: Plant 50-foot wide vegetative buffer strips of native trees and deep-rooted grasses along stream banks. Why is Plan B scientifically superior for protecting river water quality?

Concrete channels filter chemical runoff better than plants. Vegetative buffer strips slow runoff velocity, allowing root systems and soil to filter out excess nutrients and trap muddy sediment before reaching streams. Plant buffer strips cause rivers to flood city streets. Concrete channels convert chemical pollutants into fresh water.

Correct Answer:

Vegetative buffer strips slow runoff velocity, allowing root systems and soil to filter out excess nutrients and trap muddy sediment before reaching streams.

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