Explain How Scientists Have Determined That Only ~5 Percent of Mass

question 57

Essay

Explain how scientists have determined that only ~5 percent of mass and energy in the universe is "ordinary" or "normal" matter.

---

Definitions:

REM Sleep

Rapid Eye Movement sleep, a unique phase of sleep characterized by fast eye movements, low muscle tone, and vivid dreams.

Consciousness

A state where an individual is conscious of their own life, senses, thoughts, environment, and experiences.

Self-Awareness

The conscious knowledge of one's own character, feelings, motives, and desires.

Mental Processes

Operations of the mind, including thought, perception, memory, and decision-making.