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:

South American Country

Any sovereign state located on the continent of South America.

Española

A term that can refer to a female of Spanish descent or, geographically, to the island of Hispaniola in the Caribbean, shared by Haiti and the Dominican Republic.

Spanish Explorers

Adventurers from Spain who traveled to the Americas and other parts of the world in the 15th to 17th centuries, claiming territories and spreading Christianity.

Caribbean Islands

A diverse group of islands in the Caribbean Sea, known for their distinct cultures, languages, histories, and natural beauty, playing a crucial role in the Americas' history.