Lake Springfield in the city of Springfield, Illinois, is a busy place where people swim and fish. The lake also supplies drinking water for Springfield residents and cooling water to a nearby coal-fired power plant
Beautiful homes surround most of the lake. Over the past 15 years, the bacterium Leptospira, commonly found in agricultural animal waste, has been detected in this lake water, and some people have become sick. The contamination of the lake by Leptospira may best be prevented by A) better control of agricultural nonpoint source pollution of the lake.
B) doubling the amount of fluoride added to the city's public water supply.
C) restricting swimming in the lake to only weekends.
D) requiring the power company to find another source for its cooling water.
A
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A day of the year when the length of the night is equal to the length of the day is known as a(n) ________.
Fill in the blank(s) with correct word
Mountains are the __________ zone for river systems. See Figure 10.4.
Fill in the blank(s) with the appropriate word(s).
Which of the following conditions are ideal for a strong radiation inversion?
A. cloudy, windy, moist, summer night B. clear, calm, moist, summer night C. cloudy, calm, moist, winter night D. clear, calm, dry, winter night
The figure above shows an upper-level 500 mb weather map drawn over North America. If Earth was not rotating and there were no Coriolis force, what wind direction would we observe at the location of the star?
a. Southeasterly b. Southwesterly c. Northwesterly d. Northeasterly