Student activity & Level of Performance
+ appropriate student performance
- inappropriate student performance
n.a. not appropriate or not observed
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Accurate water pH measurements |
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Rinse container 2+ times
with test water |
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Fill container 1/2 full
with test water |
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Submerge indicator paper
for 1+ minutes |
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Remove and compare to indicator
color chart |
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Identify pH; record results |
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When pH reading is unclear |
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Immerse used indicator in
water for 1 minute |
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Repeat until reading is
clear; record results |
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When pH reading is unclear
after 10 min. |
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Immerse new indicator paper
for 1 minute |
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If unclear, repeat and wait
up to 10 minutes |
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If clear, record results
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If unclear, record 2nd
failure |
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