Our Textbook Discusses the Cosmic Calendar, a Model of the History

question 105

Multiple Choice

Our textbook discusses the cosmic calendar, a model of the history of the universe scaled to a single year. The length of time represented by one month on this cosmic calendar is therefore

• A)about one million years.
• B)about ten billion years.
• C)about ten million years.
• D)about 1000 years.
• E)about one billion years.

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Definitions:

Independent Variable

An element or factor in an experiment that is deliberately manipulated to observe its effect on the dependent variable.

Dependent Variable

In an experiment, the variable that is being tested and measured, expected to change as a result of manipulations to the independent variable.

Experimental Group

In a scientific study, the group of participants exposed to the independent variable, allowing researchers to determine its effect on a dependent variable.

Stress

The body's response to any demand or challenge, which can be physical, emotional, or mental.