Olivine can be converted to spinel through ________
A) directed pressure
B) heat
C) hydrothermal fluids
D) confining pressure
Answer: D
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Quartzite generally forms from the metamorphism of pre-existing ___.
a) limestone b) dolostone c) quartz sandstone d) quartz monzonite e) granite
Which of the following are current limiting factors for future human population growth?
A) Pollution and land for agriculture B) Availability of oxygen and water C) Fossil fuels and carbon dioxide production D) Oxygen levels in the atmosphere and availability of sodium chloride
Air and water pollution are directly responsible for the loss of some species. In their studies of these pollution effects, biologists have determined that ________ are especially sensitive to air pollution, and are now being used as an index of urban
air quality. A) songbirds B) lichens C) deciduous trees D) warblers E) evergreen trees
Who was the first to place north at the top of charts and east on the right?
a. Ptolemy b. Eratosthenes c. Hypatia d. Hipparchus e. Pythagoreas