As a Star Forms, the Photosphere First Appears

question 99

Multiple Choice

As a star forms, the photosphere first appears:

• A)when the planetary nebula is expelled.
• B)when the protostar forms.
• C)when contraction slows down.
• D)when nuclear fires ignite.
• E)when the star reaches the main sequence.

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Definitions:

Reckless Teen

A term often used to describe a teenager who acts without considering the consequences, engaging in risky or impulsive behaviors.

Positive Punishment

A concept in behavior psychology where an unpleasant stimulus is added following a behavior to decrease the likelihood of that behavior occurring in the future.

Negative Punishment

A behavior modification technique where a desirable stimulus is removed after the occurrence of an unwanted behavior, aiming to decrease that behavior's future occurrences.

Aversive Stimulus

A negative or unpleasant stimulus that is used to induce a change in behavior through aversion therapy or conditioning.