The Core Collapse Phase at the End of the Life

question 96

Multiple Choice

The core collapse phase at the end of the life of a massive star is triggered when

• A) the helium flash and thermal pulses have expelled the star's envelope.
• B) nuclear fusion has produced a significant amount of iron in its core.
• C) the core becomes as dense as an atomic nucleus.
• D) the density reaches a threshold at which electron degeneracy pressure begins to play a role.

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Definitions:

Babinski Reflex

A reflex action in which the big toe extends upward and the other toes fan out when the sole of the foot is stimulated, indicative of neurological issues.

Moro Reflex

An involuntary response seen in newborns, where they spread their arms and then hug themselves if they feel they are falling or when startled.

Palpate Testes

The medical examination procedure of feeling the testicles to check for abnormalities, size, and texture.

Stereognosis

The ability to perceive and recognize the form of an object by touch without visual and auditory information.