Which of the following regions of Canada likely has the most severe acid rain problem?
A. the Prairies
B. the Maritimes
C. coastal British Columbia
D. southern Ontario
Answer: D
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Which statement about caves is false?
A)They form underwater. B)They are formed by deposition of calcium carbonate. C)They form naturally and are open to the surface. D)The majority of caves are small. E)They are commonly found in regions with karst topography.
Compared to the evolutionary long-term historical average rate of extinction, extinction rates today are
A) lower. B) about the same. C) higher. D) changing from higher to lower rates in the past century.
Which of the following buildings would likely be the safest to be located in during an earthquake?
A. A twenty-story office building with glass windows B. A ten-story modern brick building C. A two-story modern wood frame house D. A top-heavy concrete parking garage E. A three-story old stone house
The howling of wind on a blustery night is believed to be caused by
a. variations in air temperature. b. winds blowing around a frozen surface. c. snowflakes striking one another but not sticking together. d. air flowing past obstructions. e. wind lifting, then lowering small objects at the surface.