Question

a student places a small amount of water in a glass dish and then carefully places a paper - clip on the surface of the water. the paperclip floats. what happens if the student adds a drop of soap to the water? check all that apply. the paperclip falls through the water to the bottom of the dish. the soap acts as a surfactant. the soap increases the surface tension of the water. the soap decreases the surface tension of the water.

Explanation:

Soap is a surfactant. When added to water, it decreases the surface - tension of water. The paper - clip was floating due to surface tension. When surface tension is decreased, the paper - clip falls.

Answer:

The paperclip falls through the water to the bottom of the dish.
The soap acts as a surfactant.
The soap decreases the surface tension of the water.