What are dikes, sills, and laccoliths? What will be an ideal response?
Dikes and sills are tabular or sheet-like igneous bodies. Dikes are discordant (they cut across rock
layers), and sills are concordant (they parallel the layering in rocks). Laccoliths are sills that inflate,
causing the overlying rock to bow upward. A laccolith has a mushroom-like geometry.
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The use of Gross National Product as an indicator of economic well-being
A. Is criticized as an inaccurate measure of the quality of life B. Predicts ecological bankruptcy through recognition of decreased natural capital C. Reflects social welfare D. Takes into account life expectancy E. Does not take into account economic activity overseas
The Hawaiian Islands formed as the Pacific Plate moved over a(n) _______________
Fill in the blank(s) with correct word
The Roman Empire introduced __________ to Europe.
a. a common infrastructure b. both a common infrastructure and specialization of goods c. exploration d. specialization of goods e. currency
How did the Cenozoic conditions of eastern and western North America differ?