How Do Scientists Estimate How Old the Universe Is

question 50

Multiple Choice

How do scientists estimate how old the universe is?

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

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Definitions:

Behaviour

Behaviour encompasses the actions and mannerisms made by individuals, organisms, or systems in response to external stimuli or their environment.

Harassed

Subjected to aggressive pressure or intimidation.

Deaf Ear Syndrome

The tendency to ignore complaints, requests, or pleas, often in a workplace or institutional setting.

Organizations

Groups of people structured in a systematic manner to meet a common goal or set of goals, such as corporations, non-profits, or governments.