Which observation best demonstrates the surface tension of water? (1 point) Responses Water freezes at 0°C and boils at 100°C. Water freezes at 0°C and boils at 100°C. Water dissolves sugar, salt, and many other substances. Water dissolves sugar, salt, and many other substances. A stream flows around rocks and other obstacles, but always downhill. A stream flows around rocks and other obstacles, but always downhill. A small insect stands on a lake, without swimming or paddling.

Answer 1

The observation that best demonstrates the surface tension of water is: A small insect stands on a lake, without swimming or paddling.

This phenomenon is due to the cohesive forces between water molecules at the surface, which creates enough tension for the insect to stay on the surface without sinking.