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

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Two groups of bean seedlings are grown under different light conditions for 10 days: - Group A (Bright Sunlight): Stem height = 14 cm, Leaves = Deep green, Mass gain = 4.2 grams - Group B (Dark Closet): Stem height = 26 cm, Leaves = Pale yellow, Mass gain = 0.2 grams Why did Group B grow taller but gain almost no dry mass?

Group B produced large amounts of sugar in the dark. Group B used stored seed energy to stretch stems upward searching for light, but could not perform photosynthesis to build new plant tissue mass. Group A seedlings died from sun exposure. Darkness converted air directly into solid stems.

Correct Answer:

Group B used stored seed energy to stretch stems upward searching for light, but could not perform photosynthesis to build new plant tissue mass.

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