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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
ions
B
bases
C
buffers
D
acids
2) What are substances that minimize changes in pH in acids and bases?
A
ions
B
weak bases
C
strong acids
D
buffers
3) A pH of 9 is an example of what?
A
a strong acid
B
a weak base
C
a weak acid
D
a strong base
4) What is an example of a buffer within a person's mouth?
A
tongue
B
gums
C
teeth
D
saliva
5) Why are buffers important to humans?
A
Buffers keep body pH within the range necessary for healthy function.
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 help keep the body at the correct temperature- not too hot and not too cold.
6) What kinds of substances have a pH below 7?
A
bases
B
ions
C
buffers
D
acids
7) What is the name of the chart used to determine whether an item is an acide of a base?
A
pH scale
B
Hp scale
C
aB scale
D
Ab scale
8) A pH of 1 is an example of what?
A
a weak base
B
a strong acid
C
a weak acid
D
a strong base
9) What are some foods that are strong acids?
A
soup & salad
B
many citrus fruits & tomoatoes
C
bread & biscuits
D
chicken & turkey
10) What term is used to describe when the body tries to maintain balance in all its systems?
A
energy
B
eclectic
C
equality
D
equilibrium
*select an answer for all questions
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