How Is a Sill Different from a Dike

question 46

Multiple Choice

How is a sill different from a dike?

• A) The sill is tabular in shape.
• B) Dikes are intrusive structures.
• C) Dikes are fine-grained and sills are coarse-grained.
• D) Sills are parallel to the layering in the country rock.
• E) A sill is shaped like a mattress, while a dike is shaped like a pillow.

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Definitions:

Afterimage

A visual image or illusion that continues to appear in one's vision after the exposure to the original image has ceased.

Opponent-Process Theory

A psychological and neurological model that explains complex behaviors and perceptions (including color vision and emotions) as the result of opposing pairs of stimuli.

Young-Helmholtz Theory

A theory suggesting that the human eye perceives color through the response levels of three kinds of cones, each sensitive to one of three colors: red, green, or blue.

Complementary Color Pairs

Colors that are opposite each other on the color wheel and when combined, cancel each other out to produce a grayscale color like white or black.