Adhesion, Cohesion & Surface Tension

Front

What property causes water to bead up on the surface of a penny?

Back

High Surface Tension

Front

What is the tendency of molecules of the same kind to stick to one another called?

Back

Cohesion

Front

Describe cohesion in the context of water molecules.

Back

Water molecules are attracted to other water molecules.

Front

Which end of the water molecule has a slightly positive charge?

Back

The hydrogen end.

Front

What is adhesion in the context of water?

Back

Water's ability to stick to other substances.

Front

Define surface tension.

Back

The cohesive force at the surface of a liquid that makes it behave like a stretched elastic membrane.

Front

How does temperature affect surface tension?

Back

As temperature increases, surface tension generally decreases.

Front

What is the difference between adhesion and cohesion?

Back

Adhesion is the attraction between different substances, while cohesion is the attraction between the same substance.

Front

Give an example of adhesion in everyday life.

Back

Water droplets sticking to a leaf.

Front

What role does surface tension play in the behavior of small insects on water?

Back

It allows small insects, like water striders, to walk on the surface of the water without sinking.