The jet stream that forms in summer near the tropopause above Southeast Asia, India, and Africa is known as the ____ jet stream
a. polar-front
b. tropical easterly
c. noctural
d. stratospheric polar night
e. low-level
ANSWER: b
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If a fusion reaction produces no appreciable radioactive isotopes, why does a hydrogen bomb produce significant radioactive fallout?
A. The radioactive fallout is a result of the fission reaction used to ignite the thermonuclear fusion reaction. B. It is a misconception that fusion reactions produce no appreciable radioactive isotopes. Therefore, radioactive fallout is unavoidable. C. Once a hydrogen bomb is exploded, all matter within nearly 100 miles becomes radioactive fallout. D. The fallout is only the radioactive remnants of the bomb's structure and casing.
Domes and basins are similar in terms of:
a. their age b. the dip direction of their opposite sides c. their location d. their size
The troposphere is composed of 99%
A. hydrogen and oxygen. B. nitrogen and oxygen. C. hydrogen and methane. D. carbon dioxide and nitrogen. E. helium and hydrogen.
Why are cT air masses of minor importance for the U.S.?
A) Prevailing winds steer them away. B) Upper level subsidence limits their formation. C) Mountains block their approach. D) No large source region is near the U.S.