Projections for mineral use, even with conservative estimates of consumption levels, suggest that present reserves of most metals/minerals could be exhausted within what time frame?
a. A few years
b. A few decades
c. A few centuries
Ans: b. A few decades
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Which is the highest grade and most carbon-rich coal?
A. peat B. anthracite C. lignite D. bituminous
The place within the Earth where rock ruptures and slips, or the place where an explosion occurs, is called:
a. Earthquake epicenter b. Earthquake focus c. Earthquake hypocenter d. Earthquake trace e. Both b and c
Which of the following best describes the field of physical geography?
A) the study of weather, climate, and related phenomenon, especially as influenced by human action B) understanding the process that lead to soil development. and the environments in which they occur C) human migration across the planet and the resulting impacts D) studying, analyzing, and mapping of the primary rock types E) the spatial analysis of all the physical elements, processes, and systems that make up the environment
Pollutants such as sulfur dioxide and ozone cause
A. Reduced yields in crop plants as well as visible damage B. Mortality in most plants C. Immediate chlorosis and then death to most plants D. Damage only to highly sensitive plant species E. Relatively little damage to plants