As the Universe Cooled,it Eventually Reached a Temperature of 3,000

question 18

Multiple Choice

As the universe cooled,it eventually reached a temperature of 3,000 K and protons were able to capture and hold electrons to form neutral hydrogen.What is this process called?

• A)ionization
• B)isotropy
• C)annihilation
• D)recombination

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Definitions:

Sellers

Individuals or entities that offer goods or services for sale in a market.

Competitive Market

A market structure characterized by many buyers and sellers, free entry and exit, and products that are similar enough to be considered substitutes.

Monopsony

A market condition in which there is only one buyer, giving that buyer considerable control over the price of goods and services.

Marginal Value Curve

A graphical representation that shows how the marginal value of a good or service changes as its quantity changes.