Which of the Following Lists the Phases of the Interstellar

question 20

Multiple Choice

Which of the following lists the phases of the interstellar medium in order,from densest to least dense?

• A) molecular clouds, H I clouds, H II regions, warm interstellar medium, coronal gas
• B) H II regions, warm interstellar gas, coronal gas, H I clouds, molecular gas
• C) molecular clouds, H II regions, coronal gas, warm interstellar gas, H I clouds
• D) H I clouds, molecular clouds, warm interstellar medium, H II regions, H I clouds, coronal gas

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Definitions:

Adults

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Hypersomnulence

A condition characterized by excessive sleepiness, even after getting an adequate amount of sleep, leading to impairments in daily activities.

Insomnia

A common sleep disorder characterized by difficulty falling asleep, staying asleep, or obtaining restorative sleep, leading to daytime impairment.

Sleepwalking Disorder

Disorder of arousal characterized by repeated episodes of walking during NREM sleep.