A Student Makes Several Measurements of the Density of an Unknown

question 50

Multiple Choice

A student makes several measurements of the density of an unknown mineral sample. She then reports the average value of these measurements. The number of significant figures she uses in her result should be a measure of its

• A)accuracy.
• B)precision.
• C)systematic error.
• D)determinate error.
• E)human error.

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Definitions:

Serotonin

A neurotransmitter that plays a crucial role in mood regulation as well as in sleep, appetite, and digestion.

Subcortical Structures

Components of the brain located below the cerebral cortex, involved in various functions including emotion, pleasure, and hormone production.

Forebrain

The anterior part of the brain, including the cerebrum and diencephalon, responsible for complex behaviors and cognitive functions.

Sympathetic Nervous System

A part of the autonomic nervous system that prepares the body for quick action in emergencies; the "fight or flight" response system.