Nitrous oxide enters the atmosphere through the burning of fossil fuels and
A. rice paddies.
B. use of fertilizers.
C. wetlands.
D. cattle.
Answer: B
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In a biomagnification situation, assume that a dangerous chemical, called "X"is present in the water of a small bay at a concentration of .00005 parts per million (ppm)
Also assume there are three layers of consumption between the water and a certain predatory bird that lives around the lake, and at each step of consumption, chemical X gets magnified 1000 times. What is the final concentration of chemical X in the predatory bird after eating 100 fish in a week? a. At the end of one week, the bird will have 50 ppm of chemical X b. At the end of one week, the bird will have 5 ppm of chemical X c. At the end of one week, the bird will have 100 ppm of chemical X d. At the end of one week, the bird will have 1,000 atoms of chemical X e. At the end of one week, the bird will have 10 ppm of chemical X
On the accompanying figure, what type of feature is located in the area of letter D?
A) Transform fault
B) Midocean ridge
C) Linear island chain
D) Fracture zone
What do tsunami warning networks use to monitor the sea surface?
A) Sonar B) Electromagnetic field detectors C) Seismometers D) Slocum gliders
Give two reasons why lightning kills fewer people now than in the past
What will be an ideal response?