Why Did the Era of Nuclei End When the Universe

question 11

Multiple Choice

Why did the era of nuclei end when the universe was about 380,000 years old?

• A)The universe had expanded and cooled enough for stable, neutral atoms to form.
• B)The nucleosynthesis era that produced the nuclei heavier than helium ended.
• C)All the free particles had combined to form the nuclei of atoms.
• D)Atomic nuclei were finally able to escape the plasma of the early universe.
• E)Photons were finally able to escape the plasma of the early universe and were no longer available to produce hydrogen and helium nuclei.

---

Definitions:

Festinger And Carlsmith

Researchers known for their 1959 cognitive dissonance experiment which explored the impact of forced compliance on attitude change.

Boring Task

A task that is perceived as monotonous, repetitive, uninteresting, or lacking stimulation, often leading to disengagement or lack of motivation.

Autonomic Nervous System

A part of the nervous system that controls involuntary actions of the organs, glands, and blood vessels, managing functions such as heart rate, digestion, and respiratory rate.

Aggression

A range of behaviors that can result in both physical and psychological harm to oneself, others, or objects in the environment.