What is the wave base?
A) Water depth equal to 1/2 the distance between successive waves
B) Maximum wave height based on wind velocity
C) The minimum elevation of a wave before it will start to curl
D) The distance up the shore where waves can erode
Answer: A
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Ozone, PAN, and small amounts of other oxidating pollutants are the ingredients of photochemical smog and grouped under a single heading called ____
a. NOx compounds b. volatile organic compounds c. hydrocarbons d. radicals e. photochemical oxidants
Which of the following sites would most likely have less dangerous volcanoes? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a midocean ridge.
A) A and B
B) B and C
C) C and D
D) A and C
E) B and D
Loss of life due to an earthquake is measured by its Richter magnitude
Indicate whether the statement is true or false
Approximately what percent of the world's irrigation water is from groundwater?
A) 15 percent B) 25 percent C) 50 percent D) 80 percent