Ozone is actually ________
A) a form of carbon dioxide
B) a form of oxygen
C) more healthy to breathe than oxygen
D) a pollutant caused by the burning of fossil fuels
E) a naturally occurring substance
Answer: B
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If the water in Well B is contaminated, can groundwater pollution from the waste pit be blamed? Why or why not?
The question is based on Figure 25-3, a map of a hypothetical landscape with an effluent stream flowing from northeast to southwest. Water table contours are drawn at 2-foot intervals and flow lines show the direction of groundwater movement at the top of the zone of saturation. The waste pit in the north was dug down to a depth just slightly above the water table in that location. A fenced pasture for grazing livestock is in the east. Two wells are shown, and the locations of three water quality sampling sites along the stream are indicated. What will be an ideal response?
If bubbles cannot escape easily from a magma, the resulting eruption is likely to
A) be explosive. B) be nonexplosive. C) produce long, thin lava flows.
Human beings cluster in which of these regions?
A) cold lands B) dry lands C) flat lands D) hilly lands
Recent research suggests that ________ has/have contributed to the large drop in fertility rates in Brazil over the past several decades
A) legalization of abortions B) soap operas C) AIDS and malaria D) laws preventing women from having more than one child E) exposure to environmental estrogens