What is the best description of the "10-year flood"?
A) a flood that can occur only once every 10 years
B) a flood that has a 10% chance of occurring each year
C) a flood that occurred within the last 10 years
D) a flood that lasts for approximately 10 years
B
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_______ is (are) responsible for placing oxygen in the atmosphere.
A - automobile exhaust B - plants C - chlorofluorocarbons D - lighting strikes E - burning
The highest numerical measurement when calculating latitude is ________°
A) 90 B) 100 C) 180 D) 360 E) 45
Which of the following is an example of point source pollution affecting the U.S. surface water supply?
A) excess fertilizers from agriculture lands B) salt from irrigation C) animal waste captured in runoff D) oil and grease from city roads E) waste from a specific factory
What happens to a rubber ducky sitting on the water surface when waves pass by?
a) It moves in a nearly circular motion, always returning to the same spot. b) The wave fronts move it progressively forward as they pass. c) The wave troughs move it progressively backward as they pass. d) It moves up and down, but not forward or backward. e) It moves side to side, but not up and down.