A Sill Is A(n)________

question 59

Multiple Choice

A sill is a(n) ________.

• A)tabular intrusion that lies parallel to surrounding layers of sedimentary rock
• B)cooled layer of an ancient lava flow
• C)intrusion formed within the magma chamber of a volcano
• D)tabular intrusion that cuts across preexisting layers

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Definitions:

Economic Models

Simplified frameworks used to describe the workings of the economy and to analyze economic variables and their relationships.

Trickle-up Theory

A theory suggesting that trends and innovations are initiated from the lower social classes and then adopted by the upper classes.

Trickle-down Theories

Theories suggesting that trends, behaviors, or innovations initiated by higher socioeconomic groups gradually spread to lower socioeconomic groups.

Trickle-down Theory

An economic hypothesis that argues benefits for the wealthy will "trickle down" to everyone else, improving the economy as a whole.