Multiple choice

Two examples of surfaces that are NOT easily penetrated.

  1. pumice and clay

  2. granite and pumice

  3. clay and granite

  4. soil and clay

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Clay and granite are both impermeable materials. Clay particles are packed too tightly for water to pass through, and solid granite lacks the interconnected pores needed for permeability.