Why Did the Temperature Start to Rise at the Center

question 45

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 the speed of the 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.

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Definitions:

Connective

Logical connectors that link propositions in a way that the truth value of the linked propositions contributes to the truth value of the entire expression.

Symbolic Form

The representation of logical propositions or statements using symbols to denote logical relationships and operations.

Connective

A symbol or word used in logic to connect propositions or sentences, such as "and", "or", "if...then".

Symbolic Form

The representation of logical propositions using symbolic notation to express logical relationships.