What type of stream is fed by groundwater from the saturated zone?
a) Spring loaded
b) Losing stream
c) Gaining stream
d) Ephemeral
e) Persistent
Answer: c) Gaining stream
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The U.S. Department of Energy estimates that wind farms at favorable sites in North Dakota, South Dakota, Kansas and Texas
a. could meet the electricity needs of the western half of the United States, minus Alaska and Hawaii b. could meet the electricity needs of these four states, thereby reducing draw of electrical power from hydroelectric dams c. could meet the electrical needs of the northern plains states during the summers, but not the winters d. could more than meet the electricity needs of the lower 48 states e. could meet the electricity needs of the 48 states during the summers if air conditioning use in private homes was reduced
If estimates of an extinction rate 10,000 times greater than the background rate are correct, then what percentage of all species will be extinct by the end of this century?
A. 5-10% B. 10-25% C. 25-33% D. 25-50% E. 60-75%
Salts and clay minerals are formed during physical weathering
Indicate whether the statement is true or false
What is the main factor that determines what will happen to a star after it consumes all of its nuclear fuel?
A) temperature B) velocity C) mass D) size E) composition