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.
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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
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.
Briefly describe the origin of the Moon
What will be an ideal response?
A decline in economic and community and deterioration of infrastructure is known as urban ________
A) death B) growth C) decay D) planning E) sprawl