At About What Time After the Big Bang Did the Universe

question 200

Multiple Choice

At about what time after the Big Bang did the universe pass through the transition from being radiation-dominated to being matter-dominated?

• A) at the Planck time, 10-⁴³ s
• B) about 15 billion years, as stars began to form
• C) 500,000 years
• D) 30,000 years

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Definitions:

Inequality

The state of not being equal, especially in status, rights, and opportunities.

Affordable Housing

housing units that are reasonably priced and accessible to individuals and families with moderate to low incomes.

Coalition

A temporary alliance or partnering of groups in order to achieve a common purpose or to engage in joint activity.

Low-income Residents

Individuals or families living with earnings that fall below a designated threshold, often leading to financial insecurity.