Science 6.5 PH Scale: Question Preview (ID: 12934)


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What kinds of substances have a pH above 7?
a) acids
b) bases
c) ions
d) buffers

What are substances that minimize changes in pH in acids and bases?
a) ions
b) weak bases
c) strong acids
d) buffers

A pH of 9 is an example of what?
a) a weak acid
b) a strong acid
c) a weak base
d) a strong base

What is an example of a buffer within a person's mouth?
a) saliva
b) gums
c) teeth
d) tongue

Why are buffers important to humans?
a) Buffers help keep the body at the correct temperature- not too hot and not too cold.
b) Buffers keep the teeth from getting cavities because it acts as a cleaning agent.
c) Buffers helps a person maintain the correct oxygen levels.
d) Buffers keep body pH within the range necessary for healthy function.

What kinds of substances have a pH below 7?
a) acids
b) bases
c) ions
d) buffers

What is the name of the chart used to determine whether an item is an acide of a base?
a) Hp scale
b) aB scale
c) pH scale
d) Ab scale

A pH of 1 is an example of what?
a) a weak acid
b) a strong acid
c) a weak base
d) a strong base

What are some foods that are strong acids?
a) chicken & turkey
b) many citrus fruits & tomoatoes
c) soup & salad
d) bread & biscuits

What term is used to describe when the body tries to maintain balance in all its systems?
a) equality
b) energy
c) eclectic
d) equilibrium

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