Praxis 5511 Practice Test Practice Question
The mass and volume of two samples of transparent solids were measured. Sample 1 has a density of 2.7 g/cm², and sample 2 has a density of 2.6 g/cm². Based on the data in the table, which of the following is a valid conclusion about the identity of the two samples?
Correct Answer: D
Rationale: Density alone does not provide enough information to definitively identify materials, as many substances can share similar densities. While Sample 1 and Sample 2 have close densities (2.7 g/cm³ and 2.6 g/cm³), this similarity does not guarantee they are the same material (Option A). Additionally, without specific reference materials to compare against, one cannot conclude that both samples are unknown (Option B) or identify them as glass and quartz (Option C), as density overlaps exist among various materials. Thus, identifying samples based solely on density is insufficient.
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