Which of the following is not a biotic component of an ecosystem?
A) plants
B) animals
C) bacteria
D) mineral nutrients
D
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Which of the following best matches the description?Converts light energy directly into electricity.
A. resources B. liquefied natural gas C. overburden D. renewable energy sources E. reserves F. acid mine drainage G. photovoltaic cell H. geothermal energy I. secondary recovery J. black lung disease K. passive solar system L. active solar system M. underground mining N. nonrenewable energy sources O. surface mining
Contact metamorphism ____
A)is principally the result of high differential pressures B)produces basalt and gabbro C)is associated with mountain-building episodes D)is also known as thermal metamorphism E)occurs within a large area
Which of the following is not true of the inputs to Earth's coastal environments?
A) Climate strongly influences coastal geomorphic processes. B) Atmospheric winds generate ocean currents and waves. C) Compared to other inputs, human activities are insignificant coastal inputs. D) Solar energy inputs drive prevailing winds, weather systems, and climates. E) Coastal geomorphology are important in determining rates of erosion and deposition.
A rock that is 90 million years old comes from the ________ Period
A) Cretaceous B) Mesozoic C) Phanerozoic D) Jurassic