________ is an example of a natural process that is accelerated by human activities.
A. Eutrophication
B. The mobilization and concentration of soluble salts from groundwater
C. The weathering and release of toxic inorganic minerals from rocks
D. Sediment loading of rivers
E. All of these are correct
Answer: E
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An Alka-Seltzer antacid tablet bubbles vigorously when placed in water but only slowly when placed in an alcoholic beverage of the same temperature containing a 50:50 mix of alcohol and water. Propose a probable explanation involving the relationship between the speed of a reaction and molecular collisions.
A. The tablet reacts with water but not the alcohol. B. The alcohol absorbs the carbon dioxide bubbles before they escape the liquid phase. C. In a 50:50 mix, there are fewer water molecules for the antacid molecules to collide with. D. Alcohol molecules are more massive than water molecules, hence they move slower and their collisions are not as forceful.
The symmetrical pattern of magnetic polarities about spreading ridges in oceanic crust basalts
indicates that:a. each plate has had an independent set of magnetic reversals. b. basalt retains its magnetic signature for only a few million years. c. new ocean crust is created by volcanism at oceanic ridges and old crust moves laterally away from the ridge. d. the oceanic crust is geologically young. e. magnetic polarity reverses but northern and southern hemispheres do not.
Affluence typically results in ____.
A. continually accelerating population growth B. less educational attainment C. increased poverty D. reduced consumption E. environmental degradation
Most of Earth's mass of living organisms consists of which of the following?
A) Animalia B) Benthos C) Nekton D) Plankton E) Plantae