Hurricanes are called major hurricanes if ________.
A. last more than 4 days
B. are classified as category 3 or above on the Saffir-Simpson Scale
C. they have air pressures greater than 980 millibars
D. the wind speeds are at least 120 km/hr
E. they make landfall at high tide
Answer: B
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Which of the following approaches is the most effective to protect fruit trees from frost?
A. Mix cold air at the surface with the colder air above. B. Spray the trees with a fine mist of water. C. Keep the air as still as possible. D. Warm the fruit trees with heated air.
The type of agriculture practiced near large cities, which includes producing fruits and vegetables, is called
A) sawah. B) truck agriculture. C) subsistence agriculture. D) truck farming. E) truck hybridization.
Relative to the A horizon, the B horizon of soil should have:
c a. low clay and high organic matter content b. high clay and high organic matter content c. high clay and low organic matter content d. low clay and low organic matter content
When air is unstable, the environmental lapse rate is ________
less than the wet adiabatic rate zero greater than the dry adiabatic rate greater than both the wet and dry adiabatic rates