8
practice testMultiple Choice

Practice Test

Question 8 • Earth and Space Science

Which statement best describes the role of Type Ia supernovae in measuring cosmic distances?

Answer
A
They provide a more accurate measurement of star distances than parallax.
B
They are the best method for measuring distances to planets within our solar system.
C
They are used to measure the universe's expansion by observing Cepheid variables.
D
They serve as "standard candles" because they have a known luminosity, allowing distance calculations.
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