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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

The property of water that enables small insects to move across the surface of a pond is

A. High viscosity
B. High surface tension due to cohesion
✓
C. Low density compared to the insect's exoskeleton
D. Low specific heat of the water surface

📝 Explanation

Cohesion creates a strong network of hydrogen bonds at the water-air interface, generating surface tension. This film-like layer is resistant to external force, supporting objects denser than water if they do not break the surface layer.

📖 Additional Information

  • High viscosity
  • High surface tension due to cohesion
  • Low density compared to the insect's exoskeleton
  • Low specific heat of the water surface

Cohesion creates a strong network of hydrogen bonds at the water-air interface, generating surface tension. This film-like layer is resistant to external force, supporting objects denser than water if they do not break the surface layer.

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