How Do Scientists Estimate How Old the Universe Is

question 83

Multiple Choice

How do scientists estimate how old the universe is?

• A) They look up the answer in a book.
• B) They measure the abundances of radioactive elements in meteorites, and use their half-lives to calculate the age.
• C) They measure how fast the Sun is losing energy, and how much energy it has to lose.
• D) They make a guess: no one really knows how old the universe is.
• E) They measure the speeds and distances of galaxies, and calculate the time it took for them to travel that distance.

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Definitions:

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A legal principle that shields corporate executives from liability for decisions made in good faith and with the belief that they were in the best interest of the company.

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