Esthetics Chapters 7,8,9

What is an example of an organic substance?

• iron

• plastic

• glass

• pure water

What term refers to the simplest form of chemical matter?

• element

• cell

• molecule

• atom

How are elements identified?

• by color

• by size

• by graphic symbols

• by letter symbols

What is it called when a chemical changes its state but not its composition?

• physical change

• chemical change

• homeostasis

• peristalsis

What is an example of a liquid?

• ice

• ozone

• steam

• serum

What is the most abundant element found on earth?

• nitrogen

• carbon

• oxygen

• hydrogen

What is the general composition of air by volume?

• equal parts oxygen and nitrogen

• one part oxygen and four parts nitrogen

• one part nitrogen and four parts oxygen

• three parts oxygen and four parts nitrogen

What is the range of the pH scale?

• 0 to 10

• 1 to 10

• 0 to 14

• 1 to 14

What color does a base turn red litmus paper?

• white

• orange

• green

• blue

A pH of eight is ___ times more alkaline that a pH of seven.

• two

• 10

• 50

• 100