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Water cohesion

  • HESI A2
  • Biology
  • Multiple choice
  • Difficulty 3 of 5

Question

A student observes a small bead of water hold together on a waxed surface. Which property best explains the water molecules remaining together?

  1. Cohesion✓ Correct

    Attraction within the water bead is cohesion.

  2. Adhesion✗ Incorrect

    Adhesion describes attraction to another substance.

  3. Water sticking to wax✗ Incorrect

    This describes adhesion to the surface.

  4. Attraction between water and wax✗ Incorrect

    This is an interaction with a different material, not cohesion.

Answer

A. Cohesion

Rationale

Cohesion describes attraction among water molecules. It helps maintain a unified bead.

RememberCohesion joins water to water.

Sources

  • Adhesion and Cohesion of Water U.S. Geological Survey · License: US government work (public domain) · Retrieved · Adhesion and Cohesion of Water

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