What is occurring in the region around the Chilkat River in Alaska that allows chum salmon to spawn during the winter months?
a. Large mounds of darkened rocks are heated by the sun and keep the river from freezing.
b. A nuclear power plant is generating wastewater heat that prevents the river from freezing.
c. Warm winds and ocean currents from the south keep the river from freezing through most of the winter.
d. Thermal springs heat and break up the ice.
Answer: d. Thermal springs heat and break up the ice.
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Which produces more energy, the fissioning of a single uranium nucleus or the fusing of a pair of deuterium nuclei? Why?
A. Fissioning a single uranium nucleus produces more energy since its mass is much greater than that of a pair of deuterium nuclei. B. Both the fissioning of a single uranium nucleus and the fusing of a pair of deuterium nuclei produce the same amount of energy since the resulting products are the same. C. Fusing a pair of deuterium nuclei produces more energy because, unlike fission, there is no radioactive waste product. D. Neither the fissioning of a single uranium nucleus nor the fusing of a pair of deuterium nuclei produces any net amount of energy. On the contrary, both processes require more energy than they produce.
Where does surface runoff from the Appalachian Mountains eventually go?
A. to the Gulf of Mexico B. to the Atlantic Ocean C. to the Dead Sea D. to the Pacific Ocean
The present day spatial distribution of Buddhism is best described as:
A) China, Tibet, Siberia, Korea B) Northern India, China, Southeast Asia C) Southeast Asia, Tibet, China, Mongolia, Japan D) Tibet, India, Middle East, Japan
Formations consist of rocks that are all the same age
a. True b. False