Why Do the Plumes of Ash Above an Erupting Volcano

question 49

Multiple Choice

Why do the plumes of ash above an erupting volcano rise to stratospheric heights?

• A) The force of the eruption does this.
• B) The ash is less dense than its surrounding air.
• C) Weather conditions at the time of the eruption control the height of the cloud.
• D) The viscosity of the lava directly affects the height of the cloud.

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Definitions:

Neurophysiological Processes

Processes related to the functioning of the nervous system, including brain activities and the mechanisms underlying neural functions.

Diathesis-Stress Model

A conception of psychopathology that distinguishes factors that create a risk of illness (the diathesis) from the factors that turn the risk into a problem (the stress).

Mental Disorder

A health condition involving significant changes in thinking, emotion, and/or behavior, associated with distress or impaired functioning.

Diathesis

A predisposition or vulnerability to developing a psychological disorder, often influenced by genetic, biological, or environmental factors.