A solution of pH 5 has ________ times ________ hydrogen ions than a solution of pH 7
A) 20; more
B) 20; fewer
C) 100; fewer
D) 100; more
E) Cannot be determined from the information given
Answer: D
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When chlorofluorocarbons are subjected to ultraviolet radiation, which of the following gases is released and rapidly destroys ozone?
A. nitrogen B. carbon C. carbon dioxide D. chlorine
Most major landslides ____
A)are caused by earthquakes B)are caused by volcanic eruptions C)have natural causes D)are due to human activity and poor engineering E)are preventable
Since the 1970s, the quality of outdoor air in most of the more-developed countries has improved.
Answer the following statement true (T) or false (F)
The most dramatic global warming is occurring in which regions?
a. equatorial regions b. polar regions c. mid-latitudes in the northern hemisphere d. mid-latitudes in the southern hemisphere e. All regions are warming about equally.