____________________ are the primary cause of ozone-layer depletion
Fill in the blank(s) with correct word
Chlorofluorocarbons (CFCs)
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What is the highest elevation in Antarctica? Is it part of an ice sheet?
What will be an ideal response?
Which of the following is true about how a lake can relate to the water table?
A. A lake can gain water if it is lower than the water table in areas adjacent to the lake. B. A lake that is above the water table may lose water to groundwater. C. The water table intersects, or is higher than, the surface in many lakes. D. All of these.
Your car lights were left on while you were shopping, and now your car battery is dead. Has the pH of the battery fluid increased or decreased?
A) The pH of the battery fluid has increased. B) The pH of the battery fluid has decreased. C) The pH of the battery fluid does not change. D) Since the lights were left on and the battery is dead, the pH of the battery fluid must be zero.
One of the primary effects of modern communications on social customs has been to
A) preserve folk cultures, by increasing awareness of their uniqueness. B) stimulate the diffusion of folk cultures around the world. C) increase the similarity of social customs in different locations. D) have little effect on the diffusion of social customs. E) slow the rate of change.