Which statement about impermeable materials is true?

Which statement about impermeable materials is true?

• A. Water flows through impermeable materials
• B. Water does not pass through impermeable materials
• C. Water passes through impermeable materials sometimes
• D. Water passes through impermeable materials easily

Answer: (B)

Permeability describes whether a substance allows water to move through it. An impermeable material has very low permeability, so water cannot pass through under normal conditions. That’s why the true statement is that water does not pass through impermeable materials. Think of clay or a plastic sheet: their structure or composition creates a barrier to water flow, preventing movement from one side to the other. In contrast, permeable materials like sand have connected pores that let water seep through more readily. While real materials can have tiny cracks or flaws that allow some movement, the general idea is that impermeable substances block water flow rather than letting it pass through.

Permeability describes whether a substance allows water to move through it. An impermeable material has very low permeability, so water cannot pass through under normal conditions. That’s why the true statement is that water does not pass through impermeable materials. Think of clay or a plastic sheet: their structure or composition creates a barrier to water flow, preventing movement from one side to the other. In contrast, permeable materials like sand have connected pores that let water seep through more readily. While real materials can have tiny cracks or flaws that allow some movement, the general idea is that impermeable substances block water flow rather than letting it pass through.