Rotation Curves for Spiral Galaxies Show

question 111

Multiple Choice

Rotation curves for spiral galaxies show

• A) most have dark halos.
• B) most of the mass lies in the nucleus.
• C) they are slowing down.
• D) rotation speed drops off further from the nucleus.
• E) no relation to mass.

---

Definitions:

Thermoreceptors

Specialized sensory nerve cells that detect changes in temperature and are responsible for sensations of hot and cold.

Combining Form

A form of a word, often a prefix or suffix, that is used to create new words when combined with other words or forms.

Xer/o

A prefix in medical terminology meaning dry, often used in terms such as xeroderma.

Hem/o

A prefix relating to blood, used in medical terminology to denote components, conditions, processes, and substances of or related to blood.