Assume that these categories represent a progression of degradation through time. In other words, if left unchecked, lightly degraded soil progresses into moderately degraded soil and so forth. Which continent poses the greatest concern for future loss of agricultural productivity?
a. South America
b. North America
c. Africa
d. Europe
e. Asia
Answer: d. Europe
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Which of the following locations would contain large, angular rocks that broke away from bedrock and moved downhill?
A. location 1, along the margins of a glacier B. location 2, along a steep mountain front C. location 3, in sand dunes D. location 4, along a beach E. location 5, on a relatively deep seafloor
Pollutants vary in their persistence, which means some ____.?
A) ?reside in the environment for thousands of years, whereas others last for only a few minutes B) ?are toxic to organisms in tiny concentrations C) ?may seem harmless, but could be very deadly to distant species D) ?may interfere directly or indirectly to marine populations
Which of the following is true about where earthquakes occur?
A. Deep earthquakes are most common near rising mantle plumes. B. Deep and intermediate-depth earthquakes occur near subduction zones. C. Earthquakes are randomly distributed across most of Earth. D. Earthquakes mostly occur away from plate boundaries.
What will be produced when carbon dioxide dissolves in seawater?
A) Calcium carbonate B) Sulfuric acid C) Carbonic acid D) Sodium chloride