Which pair of species is most likely to form an ionic bond?
A) two electrically neutral species
B) two electrically charged species, one positive and one negative
C) two negatively charged species
D) two positively charged species
B
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Biodegradable plastics may incorporate ________ to speed breakdown processes.
A. Weak structural components B. Water C. Cornstarch D. Special types of hydrocarbons E. Microscopic tears in the plastic
What percentage of river lengths in the United States have been modified through damming and bank modification?
10% 20% 50% 90%
Which of these countries has the lowest share of proven oil reserves?
A. United States B. Saudi Arabia C. Venezuela D. Iran
The urban heat island steepens the environmental lapse rate, creating unstable conditions by
A) greatly heating the ground surface with less heating further up in the atmosphere. B) greatly heating the ground surface and greatly heating the atmosphere further up. C) greatly cooling the ground surface with great heating further up in the atmosphere. D) greatly cooling the ground surface and greatly heating the atmosphere further up.