Water Unit

Which is not an example of surface tension

• athletic clothing that allows you to keep cool
• dropping paper clips into a full glass of water
• raindrops forming round beads when they fall on a car windshield
• an insect walking on water

Anything that is added to a solution that weakens the hydrogen bonds, decreasing surface tension is known as a ________________.

• solution
• solute
• surfactant
• solvent

Which of the following statements best describes a polar molecule?

• the even sharing of electrons
• the uneven sharing of electrons that creates a slightly positive and negative side
• has an overall positive charge
• has an overall negative charge

The pH of water is 

• 7, it is a base
• 7, it is an acid
• 7, it is neutral
• 0, it is neutral

When you look in a mirror next to a warm shower and you see droplets of water stick to the surface of the glass. This is____________________.

• adhesion
• capillary action
• cohesion
• surface tension

The tendency of water to move on its own up tubes through small spaces is called:

• adhesion
• cohesion
• capillary action
• surface tension

Which two forces help you fit many water droplets on a penny?

• cohesion and surface tension
• capillary action and cohesion
• adhesion and surface tension
• capillary action and cohesion

Why does water have a high cohesion?

• Water is a non-polar molecule and opposites attract
• Water is a polar molecule and opposites attract
• Water is a polar molecule and opposites repel

Which state of water has molecules with the least movement?

• gas
• solid
• liquid

When food coloring climbs up celery, changing its color, it is evidence of _________________.

• capillary action
• density
• condensation