Water Properties HW 2023

What two elements make up water?

• Helium and oxygen
• Hydrogen and oxygen
• helium and carbon
• oxygen and carbon

A water strider can skate along the top of a pond because:

• capillary action
• surface tension
• universal solvent
• specific heat

What word describes when water is attracted to other substances?

• cohesion
• adhesion
• capillary action
• surface tension

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity

Why does water move from the roots to the leaves of plants?

• surface tension
• Capillary action pulls the water molecules like a chain
• specific heat
• universal solvent

The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.

• adhesion
• capillary action
• cohesion
• universal solvent

Which is NOT a unique property of water?

• Frozen water floats on liquid water.
• Water covers most of the Earth’s surface and retains a large amount of heat.
• Water molecules stick to each other through hydrogen bonds.
• Water cools very rapidly.

What property of water helps to moderate earth's temperature (keep it from extreme temperature changes)?

• adhesion
• chohesion
• Specific heat capacity
• Latent heat of vaporization

Approximately what percentage of Earth’s water is fresh water?

• 97%
• 50%
• 10%
• 3%

Approximately what percentage of Earth's water is SALT water?

• 97 %
• 71%
• 30%
• 3%