A fluid can be:
a. a liquid but not a solid or a gas.
b. a solid but not a liquid or a gas.
c. a gas but not a liquid or a solid.
d. a gas or a liquid but not a solid.
e. a liquid or a solid but not a gas.
Question 2
Which best describes the property of surface tension in the examples pictured here?
a. Neighboring molecules of the liquid bond to each other, forming a flexible atomic sheet at the surface.
b. Molecules at the surface have different properties than atoms surrounded on all sides by other atoms.
c. At a surface, the interaction between air molecules and the fluid create the surface tension.
d. The surface tension pulls molecules out from the center of a liquid to the surface.
e. The surface tension only occurs at high temperatures.
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