ACT Science Practice Question #1768 (Hard (560)) | Test Citadel
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ACT Science Difficulty: Hard (560)

Digital ACT Science Practice Question #1768

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Which factor most directly explains why Soil Sample C permitted the lowest percolation volume? Experiment Context (Hydraulic Conductivity of Soil Columns): Civil engineers packed 50 cm vertical columns with three different soil textures and measured the volume of water percolating through each column in 15 minutes under a constant hydraulic head of 10 cm: Table 5: - Soil Sample A (Coarse Sand): 1,420 mL percolated - Soil Sample B (Sandy Loam): 380 mL percolated - Soil Sample C (Silty Clay): 18 mL percolated
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Small particle size = tiny pore spaces = low permeability.

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Clay particles are tiny and tightly packed, creating extremely small pores with high capillary resistance....

Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...

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