Radiation fog tends to form on:
a. cloudy, windy nights
b. clear, calm nights.
c. cloudy, windy days.
d. clear, calm days.
b
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Terrestrial vascular plants probably evolved from green algae
a. True b. False
Which of the following is a useful approach for separating cyclopentanamine and cyclopentanol which are both dissolved in a solution of diethyl ether?
A) Wash the ether solution with aqueous HCl. B) Wash the ether solution with aqueous NaOH. C) Wash the ether solution with an aqueous ammonia solution. D) None of these would affect the separation.
Urban sprawl is a result of people moving away from ________
A) suburbs B) current residences C) natural resources D) rural communities E) city centers
The eruptions of Yellowstone's geysers as well as most of the others on Earth can be characterized as ________
A) regular B) irregular C) containing only steam D) becoming much more frequent over time E) mysterious as to how they come to be