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If an isotope has a half-life of 50 million years,and 1/8 of the sample remaining consists of that isotope,what is the age of the rock from which it was taken?
Questionnaire Data
Facts and figures obtained by asking people about their attitudes, awareness, intentions, and behaviors.
Personal Observation
An individual's own monitoring and recording of events or behaviors, used as a method of gathering data.
Data Collection Methods
Techniques and tools used to gather, measure, and analyze data from various sources for research or decision-making purposes.
Motivations
The reasons or drives behind an individual's actions, desires, or needs.
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