Which of the following is not true of UV exposure?
A) UVA radiation is not filtered by the ozone layer and amounts for about 95% of all UV radiation reaching the Earth's surface.
B) Only exposure to UVA is a concern, not exposure to UVB and UVC.
C) UV radiation is potentially harmful and individuals should take appropriate precautions depending on the UV index.
D) UV radiation varies spatially according to the season, local weather conditions, and overhead ozone depletion.
B
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Malaria is caused by
a. viruses b. bacteria c. Plasmodium parasites d. parasitic worms e. mosquitoes
Which of the following photographs depicts an igneous rock where the magma cooled slowly at first and then had fast cooling?
A)
B)
C)
D)
What mechanism is being used to gain new information regarding deep sea circulation?
a. Acoustic tomography b. ACDP systems c. Electromagnetic field detectors d. Drift cards
Which of the following Acts prohibited dumping of waste materials into rivers without permits?
A) 1980 CERCLA Act B) 1970 Resource Recovery Act C) 2006 REACH Act D) 1965 Solid Waste Disposal Act E) 1899 Rivers and Harbors Act