How Do Scientists Estimate How Old the Solar System Is

question 114

Multiple Choice

How do scientists estimate how old the solar system is?

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

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A rephrasing or clarification of a statement or document, often used to clarify legal principles or statutes.

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Condition Subsequent

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