A Small Galaxy Orbits a Larger One

question 104

Multiple Choice

A small galaxy orbits a larger one. After many orbits, the stars in the small galaxy have dispersed throughout the halo of the larger. This is an example of

• A) conservation of angular momentum.
• B) galactic cannibalism.
• C) globular cluster formation.
• D) supermassive black hole formation.

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Definitions:

Mirror Neurons

Neurons that fire both when an individual acts and when the individual observes the same action performed by another, contributing to empathy and understanding.

Neurotransmitter

Chemical messengers used by the nervous system to transmit messages between neurons or from neurons to muscles.

Hormones

Chemical messengers produced by the endocrine glands that are released into the blood to affect target organs.

Emotional Outbursts

Sudden, extreme expressions of strong emotion that are often disproportionate to the situation at hand, sometimes resulting from stress, frustration, or other intense feelings.