AnswersCareer Explorations ACumulative Exam — Cumulative examQuestion 905
905
QuizMultiple Choice

Cumulative Exam — Cumulative exam

Question 905 • Career Explorations A

A class was performing an experiment to discover the pH values of some common household substances. The results of three groups are shown in the table below.SubstanceGroup 1 pHGroup 2 pHGroup 3 pHLemon juice2.22.22.1Vinegar2.82.88.2Baking soda8.48.58.4Milk of magnesia10.210.310.2Which statement best describes evidence that Group 3’s data are less valid than the data for the other two groups?

Answer
A
Group 3’s pH value for lemon juice is lower than the values of the other two groups.
B
Group 3’s pH value for vinegar is much higher than the values of the other two groups.
C
Group 3’s pH value for baking soda does not exactly match the values of the other two groups.
D
Group 3’s pH value for milk of magnesia is different from the value obtained by Group 2.

Explanation

Compare the groups’ results for each substance. For vinegar, Groups 1 and 2 both measured pH 2.8, while Group 3 measured pH 8.2, a large difference that suggests an error. The small differences in the other measurements are much less concerning, so the best evidence is that Group 3’s vinegar pH is much higher.

AI-written and checked against the verified answer.

Previous
Next

More from this Course

Assignment
23 verified answers

Agriculture, Food, and Natural Resources Workplaces and Tasks

Assignment
41 verified answers

Career Cluster Overview

Assignment
37 verified answers

Personal Assessment