In the Northern Hemisphere, cold air outbreaks in the winter are commonly related to the movement of the
A) subtropical jet stream.
B) ITCZ.
C) polar front/polar jet stream.
D) Pacific High.
Answer: C
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Which statement is true when one wants to perform queries using both spatial and attribute data?
A. One must perform spatial data query first. B. One can perform query first with either spatial data or attribute data. C. One must perform attribute data query first. D. None of these are correct.
In toxicology studies, the threshold level of a chemical is the dose of the chemical ________
A) above which at least 50% of the organisms being tested died B) below which there is a measurable decline in the health of the organism being tested C) below which at least 50% of the organisms being tested died D) above which there is a measurable decline in the health of the organism being tested
Near the shore of an extremely large lake, steam fog is more likely to form during the ____ and advection fog in early ____
a. ?spring; summer b. ?summer; winter c. ?winter; summer d. ?winter; autumn e. ?autumn; spring
Which of the following places is well known for its intrusive igneous rocks that were exposed by erosion?
A) Yosemite National Park B) Yellowstone National Park C) Mount St. Helens Volcano D) Hawaii