A condition where warmer air lies above cooler air, limiting vertical circulation and trapping pollutants near the surface, is
A) photochemical smog.
B) temperature inversion.
C) source separation.
D) photovoltaic cells.
Answer: B
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What form of diffusion is represented by the spread of Wal-Mart?
A. reverse hierarchical B. stimulus C. cascade D. relocation
The fundamental success of ocean depth measurements taken by satellites is based on the variation of gravitational pull associated with bathymetric features
Indicate whether the statement is true or false
Why didn't ice gather in central and northern Alaska in the last ice age?
A) Proximity to the sea kept it too warm. B) The climate at that time was tropical. C) There was too little precipitation. D) There was too much geothermal heating from volcanic action.
Which of the following is not a reason that poor families in developing countries might have many children?
A) Children are helpers for essential chores on the farm. B) Most children survive beyond one year. C) high mortality among the young D) to assure care of parents in their old age E) The more males born to a family, the better it is for managing the family farm or business.