Carbon-14 is created in the atmosphere by the nuclear reaction of neutron from the cosmic rays and ________ in the atmosphere.
A. hydrogen
B. oxygen
C. dust
D. nitrogen
E. water vapor
Answer: D
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The primary aim of the National Environmental Policy Act is to ____.
A. set standards for pollution levels B. require screening of new products for safety and setting standards C. encourage resource conservation D. set aside or protect certain species, resources, and ecosystems E. require evaluation of the environmental impact of an activity proposed by a federal agency
____________________ is an intense discharge of electricity
Fill in the blank(s) with correct word
A single oscillation of the tides (from low tide to high tide and back again) takes about ________ hours
A) 24 B) 12 C) 6 D) 3 E) 2
There had been a strong Uzbek national identity prior to the formation of the Uzbek Soviet Socialist Republic.
a. true b. false