Properties of Water Quick Check

Large bodies of water do not quickly fluctuate in temperature. Why?

• Water is a solvent.

• Water acts as a buffer.

• Water has a high heat capacity.

• Water is non-polar.

What word describes when water is attracted to other substances?

• cohesion

• capillary action

• adhesion

• surface tension

Attractions between water molecules are called

• Covalent bonds

• Polar bonds

• Ionic bonds

• Hydrogen bonds

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.

• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.

• The molecule has two poles, at which it is colder than other regions of the molecule.

• The water molecule is neutral.

Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

• Water absorbs heat when it evaporates and forms a gas

• Water molecules completely separate into ions in solutions.

• Water expands and becomes less dense when it freezes.

• Water forms hydrogen bonds with ions and other polar substances.

What is water's molecular formula?

• A

• B

• C

• D