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Science 6.5 PH Scale
Test Description: This is a review of what we learned in Science 6.5 about how to classify items as acids or bases according to pH.
Instructions: Answer all questions to get your test result.
1) What kinds of substances have a pH above 7?
A
buffers
B
bases
C
acids
D
ions
2) What are substances that minimize changes in pH in acids and bases?
A
buffers
B
strong acids
C
ions
D
weak bases
3) A pH of 9 is an example of what?
A
a weak acid
B
a strong base
C
a weak base
D
a strong acid
4) What is an example of a buffer within a person's mouth?
A
teeth
B
saliva
C
tongue
D
gums
5) 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.
6) What kinds of substances have a pH below 7?
A
buffers
B
bases
C
acids
D
ions
7) What is the name of the chart used to determine whether an item is an acide of a base?
A
Ab scale
B
Hp scale
C
aB scale
D
pH scale
8) A pH of 1 is an example of what?
A
a weak acid
B
a strong base
C
a strong acid
D
a weak base
9) What are some foods that are strong acids?
A
bread & biscuits
B
soup & salad
C
many citrus fruits & tomoatoes
D
chicken & turkey
10) What term is used to describe when the body tries to maintain balance in all its systems?
A
equality
B
eclectic
C
equilibrium
D
energy
*select an answer for all questions
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