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AssignmentMultiple Select

Collecting and Organizing Data

Question 2 • PA-Biology CR

Marcy uses pH strips to measure the pH of water samples from several ponds in the city park. Which reason explains why using a pH meter would improve the accuracy of her data?

Answer
A
The pH meter gives a digital readout.
B
The pH meter uses numbers instead of colors.
C
The pH meter can distinguish between smaller differences in pH than pH strips can.
D
The pH strips are more expensive to use.

Explanation

A pH meter can measure pH in finer increments than strips, which show results through a limited range of colors. This lets Marcy distinguish smaller differences among the pond samples and improves measurement accuracy. A digital display or using numbers rather than colors does not by itself ensure greater accuracy, and the cost of the strips is unrelated.

AI-written and checked against the verified answer.

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