The Cosmic Background Radiation Comes from a Time After the Origin

question 31

Multiple Choice

The cosmic background radiation comes from a time after the origin of the universe

• A) when protons and neutrons were first formed.
• B) when the big bang first began to expand.
• C) the inflationary period.
• D) when gamma rays had enough energy to destroy nuclei.
• E) when electrons began to recombine with nuclei to form atoms.

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Definitions:

Factor Market

A marketplace where factors of production (e.g., labor, capital) are bought and sold.

Circular-Flow Diagram

A graphical outline that tracks the flow of monetary resources through markets, between companies and household sectors.

Households

Economic units consisting of all individuals who live together and make joint decisions regarding consumption and other financial matters.

Businesses

Entities engaged in commercial, industrial, or professional activities with the goal of generating profits.