What Was the Temperature of the Universe When the Recombination

question 55

Multiple Choice

What was the temperature of the universe when the recombination took place that produced the cosmic background radiation we observe today?

• A)about 2.7 K
• B)about 300 K
• C)about 3,000 K
• D)about 3 billion K

---

Definitions:

Nervous System

An extensive network of neurons and supporting tissues that processes information in the body through electrical and chemical signals.

Coagulation

The action or process of a liquid, especially blood, changing to a solid or semi-solid state.

Platelets

Small, disk-shaped cell fragments in the blood that are essential for blood clotting.

Megakaryocytes

Large bone marrow cells responsible for the production of blood thrombocytes (platelets).