Exam 1 Review

Which of the following makes up a molecule of water?

• one atom of oxygen, two atoms of hydrogen

• one atom of hydrogen, two atoms of oxygen

• one atom of chlorine, one atom of sodium

• one atom of hydrogen, one atom of oxygen

Ice floats on water because

• adhesion

• cohesion

• water expands when it freezes

• water shrinks when it freezes

When salt is dissolved in water, water is the

• solvent

• solute

• solution

• reactant

A substance with a pH of 6 is called a....

• Base

• Acid

Oil and water don't mix because oil is

• hydrophilic

• hydrophobic

• an emulsifier

• a buffer

What property of water is in this picture?

• high specific heat

• surface tension

• greatest density at 4^oC

• capillary action

During the winter when lakes freeze over the fish and other animals living in it survive. Which property of water?

• high specific heat

• capillary action

• greatest density at 4 ^oC

• surface tension

Water is a polar molecule, which means it has a positive and a negative side. Hydrogen bonds form when:

• _{The positive end of one water molecule bonds to the positive end of another water molecule.}

• _{The negative end of one water molecule bonds to the negative end of another water molecule.}

• _{The positive end of one water molecule bonds to the negative end of another water molecule.}

The ability of water molecules to stick to each other, creating surface tension is called:

• Cohesion

• Adhesion

• Insulation

• Ph

The fact that water can stick to other substances is called:

• Ph

• Adhesion

• Cohesion

• Insulation