The kinetic energy of a roller coaster is greatest
A. where potential energy is least.
B. at the lowest part of the track.
C. both of these
D. none of the above
Answer: C
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Many of the world's deserts are found near 30° latitude because ____
A) the intertropical convergence zone is located there B) of sinking air found near the polar front C) of the convergence of the prevailing westerlies and the northeast trade winds D) of the sinking air of the subtropical highs
Compared with curve 2 on this hydrograph, what is a possible explanation for curve 1? 
A. Curve 1 shows the same area as curve 2 but after urbanization. B. The storm recorded by curve 1 was shorter and more intense than the storm represented by curve 2. C. The basin for curve 1 has steeper slopes than the basin for curve 2. D. All of these are possible.
A pioneer community of plants is essentially a single ________
A) plant B) seral stage C) climax forest D) localized extinction E) migration path
A parcel of air at 5 km. and an initial temperature of 10°C altitude descends to 3 km altitude at the unsaturated adiabatic lapse rate. What is the temperature at 3 km?
A. 60°C B. 30°C C. 0°C D. -30°C