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To see a solar eclipse, you have to be in Earth's shadow.
Correlation
A measure that represents the extent to which two variables change together, but it does not necessarily imply causation.
Validity
The extent to which a test, measure, or research accurately reflects or assesses the specific concept it is intended to.
Reliability
The degree to which an assessment tool or measurement can produce stable and consistent results over time.
Hypothesis
A proposed explanation made on the basis of limited evidence, serving as a starting point for further investigation.
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