Compare and contrast dikes and sills


Dikes and sills are both tabular or sheetlike igneous bodies. However, dikes cut across the country rock's layering and sills have boundaries that parallel the layering in the country rock.

Environmental & Atmospheric Sciences

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Which of the following is a reasonable approximation of the rate that plates move?

A) the speed a turtle walks B) the rate of growth of human hair or fingernails C) the speed of a mountain glacier D) the speed of deep ocean currents

Environmental & Atmospheric Sciences

If a country experiences 6 births, 4 deaths, and 1 new immigrant every minute of a year, how will its population change in one year?

A) The population will decline by about 100,000 people. B) The population will remain steady. C) The population will increase by about 1.5 million people. D) The fertility rate is still needed to determine population changes.

Environmental & Atmospheric Sciences

Briefly describe the origin of the Moon

What will be an ideal response?

Environmental & Atmospheric Sciences

A decline in economic and community and deterioration of infrastructure is known as urban ________

A) death B) growth C) decay D) planning E) sprawl

Environmental & Atmospheric Sciences