The Existence of the Cosmic Background Radiation Tells Us That

question 85

Multiple Choice

The existence of the cosmic background radiation tells us that the early universe was

• A) much hotter than it is today.
• B) much colder than it is today.
• C) composed entirely of radiation at early times.
• D) composed entirely of stars at early times.
• E) about the same temperature as today but much more dense.

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Definitions:

Variable Substitution

Replacing variables with specific values or expressions within mathematical equations to simplify or solve them.

Exponentiation

A mathematical operation involving two numbers, where one number, the base, is raised to the power of the other, the exponent.

Exponentiation

The operation of raising one number (the base) to the power of another (the exponent), a fundamental mathematical operation.

System of Equations

A set of two or more equations that share two or more unknowns.