A Graywacke Is_______

question 34

Multiple Choice

A graywacke is_______ .

• A)a sandstone with the sand grains embedded in a clay- rich matrix
• B)a dark, organic- rich, chemical sedimentary rock containing small crystals of halite
• C)a dark- gray, calcite- rich mudstone or shale containing pyrite
• D)a limestone with abundant, sand- sized, quartz grains

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Definitions:

Sensitivity

The capacity to perceive, feel, or be aware of stimuli or changes in the environment; can also refer to the degree of responsiveness to social or emotional matters.

Weber Fraction

A principle that quantifies the perception of change in a given stimulus, stating that the just noticeable difference is a constant proportion of the original stimulus’s intensity.

Difference Threshold

The smallest amount that a given stimulus must be increased or decreased so that an individual can detect the difference.

Standard Stimulus

A specific stimulus used as a reference point in psychological experiments to measure reactions or perceptions.