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Evaluating Source Credibility in Science
Worksheet
Grade Level
Grade 7
7.14 Evaluating Source Credibility in Science
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A student claims: “Some medications can lose effectiveness after the expiration date because chemicals break down.” Which source is most credible and relevant?
A
A rumor that expiration dates are ‘made up.’
B
A pharmacy-science reference explaining stability testing and how active ingredients can degrade over time, with general evidence.
C
A personal story about using an old medicine once.
D
A store ad telling you to buy more medicine.
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