Why Did the Temperature Start to Rise at the Center

question 89

Multiple Choice

Why did the temperature start to rise at the center of the solar nebula?

• A) Supernova explosions were stirring up the material there and causing turbulence.
• B) The nebula was contracting, which increased collisions between atoms moving in it.
• C) Fusion reactions were beginning in the core, releasing tremendous amounts of heat.
• D) Massive stars nearby were heating the nebula with their ultraviolet radiation.

---

Definitions:

Performance Appraisals

Evaluations of an employee's work performance over a specific period, often used to determine promotions, pay raises, and developmental needs.

Channel

The physical means by which a message is sent. Written channels include e-mails memos, letters, and billboards. Oral channels include phone calls, speeches, and face-to-face conversations.

Bad News

represents information or broadcasts that are negative in nature, often relating to unfortunate events or situations.

Structured Message

A communication delivered in an organized and logical format, making it easier to understand and respond to.