Energy efficiency is ________
A) increasing demand but decreasing accessibility of various energy sources
B) the process of using less energy to obtain goods and services
C) the amount of energy used per dollar of economic output
D) a measurement of overall energy use
E) reducing energy wastes
Answer: B
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The Younger Dryas event tells us that ________
A) ice core samples are unreliable proxy records B) we have not always fully understood proxy records, since it turns out that what we call the Younger Dryas event actually took place before the Elder Dryas event C) climate change has not always necessarily been a gradual process D) the more recent warming trends have typically been associated with unusually dry periods
Plants release water to the atmosphere through the process of sublimation
Indicate whether the statement is true or false
The African region has a wealth of inland waterways, but frequent changes in elevation and escarpments make them difficult for transportation. However, they are especially attractive for
a. hydroelectric power. b. large urban areas. c. oil and gas exploration. d. casino and gaming facilities. e. heavy manufacturing.
Which of the following is an example of a speleothem?
A) Stalagmite B) Sinkhole C) Spring D) Hot spring