Heat-expanded air ________.
A. is less dense than cool air
B. has the same density as cool air because matter is neither created nor destroyed in fire
C. is more dense than cool air because molecules are pushing harder on each other
D. contains less energy than cooler air because there are fewer molecules per unit volume
Answer: A
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Genetically modified crops ____.
A. need more fertilizer B. need more water C. could reduce biodiversity D. cannot tolerate herbicides E. produce lower yields
Which item is a nonuse value?
A. existence value B. monetary cost C. mitigation cost D. willingness-to-pay value E. utilitarian value
Pharmacologic management for a black widow spider bite may include:
A) atropine. B) diazepam. C) diltiazem. D) etomidate.
The nucleus of a comet is a block of ________.
A. iron B. organic material C. helium D. rock E. ice