Question

which of the following observations best demonstrates water’s special property of cohesion? a. a spoon held near a stream of water from a tap deflects the water towards itself. b. a rainbow forms after a rain storm. c. water forms droplets of dew on a spider web in the morning. d. water can dissolve other substances, such as sugar and salt.

Explanation:

To determine which observation shows water's cohesion (attraction between water molecules):

• Option A: A spoon deflecting water likely shows adhesion (water to spoon), not cohesion.
• Option B: A rainbow is due to light refraction, not cohesion.
• Option C: Dew droplets on a spider web show surface tension (from cohesion), as water molecules stick together to form droplets.
• Option D: Dissolving substances shows water as a solvent, not cohesion.

Answer:

C. Water forms droplets of dew on a spider web in the morning