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

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 is because surface tension allows the insect to remain on the surface of the water without sinking, due to the cohesive forces between water molecules at the surface creating a "skin" that can support small weights.