Use the diagram below to answer Question #4.
Understand the Problem
The question is asking us to analyze the radioactive decay of Uranium-235 into Lead-207 based on the provided diagrams and use this information to answer a specific question related to sample data. The focus is on interpreting how uranium decays over time and relates to the samples listed.
Answer
A: 2 half-lives, B: 5 half-lives
Sample A represents 2 half-lives, and Sample B represents 5 half-lives.
Answer for screen readers
Sample A represents 2 half-lives, and Sample B represents 5 half-lives.
More Information
The graph indicates how much of Uranium-235 remains over multiple half-lives, helping determine the age of zircon samples.
Tips
Ensure to carefully match the percentages on the graph with the correct number of half-lives.
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